Regarding Loeb, here's his basic CV (and Wiki page) :

"He has won the World Rally Championship a record eight times in a row, and also holds several other WRC records, including most points, wins and podium finishes."

Obviously Man U have been mentioned and they did indeed surpass Liverpool. But Liverpool themselves would have to be mentioned, 1973-1990:

4 European Cups
2 UEFA Cups
1 UEFA Super Cup
11 League Titles
3 FA Cups
4 League Cups
10 Charity Shields
1 Treble
7 assorted Doubles

Windies and the Aussies were good calls.

Maybe the Patriots 2001-4? Three Super Bowl victories in four seasons is hard to do.

That was okay, and bully for them, but for me it was the weakest the NFL ever was. It was right when free agency weakened teams beyond belief, and Belichek was able to exploit rules and this and that to find players that would fit the system. Their 2007 team was much more impressive, and by the time that team rolled around it was the first time that I saw a team that could have taken out the 70s Steelers or 80s Niners.

Those two dynasties would have to be the greatest ever in the NFL. The Steelers won 4 in 6 years, but had to deal with the likes of the undefeated Miami Dolphins and the Oakland Raiders and the Dallas Cowboys (and impressive shotgun-scattered dynasty in their own right, with 8 Super Bowl appearances and 5 champions in 25 years.)

The Niners won 5 in 13 years, but had the likes of the NY Giants, Chicago Bears, Washington Redskins, and when-they-get-hot-they-got-real-hot Cincinatti Bengals to deal with.

Anxious for the rest El Tel. This is like a liveblog of a horror film when we're talking about what victims will be on the list. Only in reverse.

The 1981-1998 49ers were pretty amazing. From 1983-1998 they won 10 or more games 16 straight times. The next best record is something like 9 in a row. In the playoffs every year but 1991, and that team was probably the best team post-merger to miss the playoffs (they were 2nd in the league in pt. differential, and were incredibly unlucky in close games). And that year Montana didn't play at all and Young got hurt, so their 3rd stringer QB Steve Bono played in 9 games, starting 6.

But the greatest dynasty ever are the 1960s Packers. Five titles in seven years, could easily have been six in eight or seven in eight had they had a playoff system.

With a great team spirit, work ethic and commitment to defence (exemplified by defensive specialist nasty cheat Bruce Bowen)

dictated.wordpress.com/2008/03/14/bruce-bowen-deserves-to-die/

youtu.be/RmI4r1XviVI
youtu.be/tdxXvkMB6gA
youtu.be/9p29aGNsyBs
youtu.be/BJ8ubgYYEdc
youtu.be/6VDMaNyYCMk

And let's not forget, Bowen has managed to kick two players in the face during games:

www.thenolookpass.com/wp-content/uploads/2009/09/bowen_kick.jpg
youtu.be/edb6bz_C9ms

Reed John wrote:
Cael Sanderson, wrestling
Four high school state championships
127-3 in high school
Four NCAA championships
159-0 in college (only one to ever do that)
Olympic Gold Medal
National Championship as a coach

Nothing compared to Karelin
en.wikipedia.org/wiki/Alexander_Karelin

"13 years undefeated in international competition and six years without giving up a point"

18. AJAX AMSTERDAM - Football (1969-1973)

Achievements:
3 x European Cups (1970/71, 1971/72 & 1972/73)
1 x Intercontinental Cup (1972)
1 x UEFA Super Cup (1973)
3 x Eredivisie titles (1969/70, 1971/72 & 1972/73)
3 x KNVB Cups (1969/70, 1970/71 & 1971/72)

Coaches: Rinus Michels & Stefan Kovacs

Key players: Johan Cruyff, Johan Neeskens, Arie Haan, Johnny Rep & Ruud Krol.

It would pretty redundant to write much (on a football forum) about Gloria Ajax since their success and their impact on football from a philosophical standpoint has been so well documented. Of note, they had an excellent record at home going unbeaten for two full seasons from 1971-1973 (46-0-0), they were almost invincible in 1971/72 recording just one defeat in the whole season and achieving a quadruple (the Netherlands national league, KNVB Cup, European Cup & and Intercontinental Cup). Their dominance of the European Cup concluded with the departure of Johan Cruyff (pictured) who left Ajax for Barcelona in the summer of 1973. It would be another two decades until they won the competition again.

17. DALLAS COWBOYS - American Football (1992-1996)

Achievements:
3 x Super Bowls (1992, 1993 & 1995)
3 x NFC championships (1992, 1993 &1995)
5 x NFC East division titles (1992, 1993, 1994, 1995 & 1996)

Coaches: Jimmy Johnson & Barry Switzer

Key players: Troy Aikman, Emmitt Smith, Michael Irvin ( all pictured below) & Deion Sanders.

By the time former University of Arkansas lineman Jerry Jones purchased the Dallas Cowboys in February of 1989 it had been seven years since their last postseason victory. The Cowboys had just gone 3-13 in the preceding campaign, their worst showing since their inaugural season when they had posted a 0-11-1 record. As bad as those two seasons were the intervening period had, for the part been extraordinarily successful: from 1966 to 1985 the 'Boys won 13 divisional titles, 7 conference championships, 2 Super Bowls and the hearts and minds of the American public, earning the nickname "America's team" along the way. The architect of these triumphs was Tom Landry, the only coach the franchise had ever known, Dallas' Bill Shankly, Matt Busby and Herbert Chapman all rolled into one.

Jerry Jones didnt waste time in firing Landry, appointing his former Arkansas teammate and University of Miami head coach Jimmy Johnson as his successor. A 1-15 season followed but over the next couple of seasons a formidable team was constructed. Former Heisman trophy winning running back Hershel Walker was offloaded for half a dozen draft picks and Jones and Johnson drafted shrewdly. UCLA QB Troy Aikman and Florida running back Emmitt Smith (and a slew of future Pro Bowlers) were added to existing standouts Michael Irvin, Nate Newton and Ken Norton Jr. The end result was 3 Super Bowls in 4 years (with two different coaches, Johnson was replaced in 1994 with Barry Switzer ).

Unfortunately, however the team acquired an appetite for the high life that would have put George Best to shame. By the time Michael Irvin was arrested on drug charges in 1996 things had begun to unravel, his enforced absence due to suspension impacted the Cowboys heavily and they never recovered that season, or since. Since those halcyon days Dallas have won just a solitary playoff game and despite starting most seasons favoured to win their division and make waves in the postseason, despite playing in a gargantuan new stadium and despite signing some big name free agents (TO, Pacman Jones, Mike Vanderjagt and the like) the glory days don't seem likely to return to the big D anytime soon.

Steve Redgrave, during the first sixteen years (and a few months) of my life, has to be in with a shout.

World Championship gold medals in 1986, 87, 91, 93, 94, 95, 97, 98 and 99, with a smattering of bronzes and silvers mixed in as well, and of course one of the only competitors ever to win gold medals in five consecutive Olympic Games (1984, 88, 92, 96 and 2000). For the second half of that period, he trained and continued winning medals whilst being quite an unwell man, as well.

From his Wiki:

His 14 total Olympic and World Championship gold medals is unsurpassed by any other rower in history, although later equalled by his long-time rowing partner Matthew Pinsent.

Pinsent himself would probably be a worthy addition to the list, if he'd been partnered by literally any other participant in his sport's history.

16. WALLABIES - Rugby Union (1998-2002)

Achievements:
1 x Rugby World Cup (1999)
1 x British Lions tour series win (2001)
2 x Tri Nations titles (2000 & 2001)
5 x Bledisloe Cup holders (1998, 1999, 2000, 2001 & 2002)

Coach: Rod MaQueen

Key players: John Eales, Tim Horan, George Gregan, Stephen Larkham & Toutai Kefu.

Of all the teams in this list, its the late 90s/early 00s Wallabies that have the most questionable credentials as to whether they can be called a true dynasty (in terms of longevity). However, the Rugby they played was wonderful and they won their fair share of silverware with players who have legitimate claims to have been all time greats in their respective positions so all in all they have a strong enough case to merit inclusion.

The team really began to take shape during Englands ill fated "Tour to Hell" in 1998. It was in their 76-0 drubbing of the "Poms" that mercurial genius Stephen Larkham (pictured) made his debut at flyhalf, when prevailing wisdom at the time suggested that he did not have the tactical kicking game to be successful there at Test level. In the wake of the Cook Cup annihalation MacQueen's switch of "Bernie" from fullback to #10 was hailed as a masterstroke and it was here, much to the chagrin of defence coaches the world over that he played for the Wallabies until retirement a decade later. With a gameplan designed around his attacking flair and intricate, choreographed set piece and backline moves the Wallabies were an intellectual match for allcomers at the turn of the century. Scrum half Gregan linked superbly with his arsenal of backrow ball carriers, the likes of Toutai Kefu, Jim Williams, David Wilson and Owen Finnegan whose punishing runs would constantly get the Aussies on to the front foot and over the gain line. From that platform and having sufficiently softened up the opposition Gregan would unleash Larkham who would skip the ball out to his three quarters or bring it back inside with a deft, well disguised reverse pass. The Wallabies employed decoy runners to further bamboozle their opponents, leading many cynics to claim that their backline moves were built around obstructing would be tacklers. When teams overplayed the pass Larkham was adept at finding the smallest of holes in the oppositions defensive line which he would accelerate into with devastating effect. He didnt have the structured kicking game of a Naas Botha or a Grant Fox but his kicks almost always put fullbacks in trouble and he had a wicked grubber when called upon [/manlove.]

Anyway, with such a creative talent allied to a cerebral approach in attack and watertight defence (only 1 try conceded at the 1999 RWC) the Wallabies enjoyed enormous success under MacQueen. Enduring memories will be Larkham's 50 yard drop goal to knock the Springboks out at the 1999 RWC, Eales last minute goalkick to retain the Bledisloe in 2000 and Kefu's last minute try in 2001 that did likewise. Hopefully another golden era for Australian rugby is just around the corner and if its half as enjoyable as the last we'll be in for a treat.

15. WEST INDIES - Cricket (1975-1991)

Achievements:
2 x Cricket World Cups (1975 & 1979)
27 x consecutive Test matches without defeat (1982-1984)
19 x consecutive Test series without a series defeat (1980-1989)
11 x consecutive Test match victories (1984)
2 x "blackwashes" v England (1984 & 1985/86)

Key players: Sir Viv Richards, Malcolm Marshall, Gordon Greenridge. Clive Lloyd & Michael Holding.

en.wikipedia.org/wiki/History_of_the_West_Indian_cricket_team
The 1980s started with a one-nil victory away to England over five Tests, one-nil away to Pakistan over four Tests, two-nil home to England over four Tests and a one-all draw away to Australia. Then in 1982–83, a West Indian rebel team toured apartheid South Africa. It was led by Lawrence Rowe and included prominent players like Alvin Kallicharran, Colin Croft, Collis King and Sylvester Clarke. WICB banned the players for life (which was later revoked), and some were refused entry back home. However, the rebels managed another tour the next year, which included most of the players of the original team. Despite this loss of talent, the official Windies side continued to dominate. During this time, the West Indies established themselves as one of Test cricket's all-time great sides, peaking perhaps on their tour of England in 1984, where they won the series 5–0, the only time in Test cricket history the touring side has whitewashed a five-test series. This was followed by a second "blackwash" against England at home in 1985–86. At the same time, the West Indies established the then-record of 11 consecutive Test victories, which was part of a still-standing record of 27 Tests without defeat. In the period from 1980 to 1985–86 they won 10 out of 11 Test series, the 1981–82 series in Australia being drawn 1–1. The West Indies' only notable defeat in this period was in the one-day arena, when, to general surprise, they lost to India in the final of the 1983 World Cup.
West Indian captain Lloyd retired from Test cricket at the end of the 1984–85 series against Australia. In total Lloyd had captained West Indies in 74 Test matches, winning 36 of them. Vivian Richards was Lloyd's successor, and continued the run of success. Meanwhile, a change of old guard was also happening. Joel Garner and Michael Holding had retired by 1987. A major find was Curtly Ambrose, who was as tall as Garner and equally effective with the ball. Courtney Walsh, who made his first appearance in 1984, bowled with an action that resembled Holding. Ian Bishop also had a similar action, and was as good a bowler till injuries interrupted his career. Patrick Patterson was faster than all the rest, but had a short career. Marshall still was the finest fast bowler in the world. But batting was beginning to show signs of weakness. West Indies failed to qualify for the semifinal of the 1987 World Cup. By the end of the eighties, while still the best team in the world, they had lost the aura of invincibility that they had till the middle of the decade. Finding good replacements for senior players was again becoming a problem.

Pietro Paolo Virdis wrote:
Reed John wrote:
Cael Sanderson, wrestling
Four high school state championships
127-3 in high school
Four NCAA championships
159-0 in college (only one to ever do that)
Olympic Gold Medal
National Championship as a coach

Nothing compared to Karelin
en.wikipedia.org/wiki/Alexander_Karelin

"13 years undefeated in international competition and six years without giving up a point"

Yeah, but that's Greco-Roman which doesn't award many points and is boring.

El Tel, just go ahead and write the book.

Outstanding.

14. LOS ANGELES LAKERS - Basketball (1979-1991)

Achievements:
5 x NBA championships (1980, 1982, 1985, 1987 & 1988)
9 x Western conference champions (1980, 1982, 1983, 1984, 1985, 1987, 1988, 1989 & 1991)
10 x division titles (1980, 1982-1990)

Coaches: Paul Westhead & Pat Riley

Key players: Magic Johnson, Kareem Abdul Jabaar, James Worthy & Byron Scott.

When the Lakers drafted Magic Johnson (pictured) with the first overall pick in the '79 draft they werent the storied franchise that we think of them as today. Actually they were. Kind of. They had a distinguished past in Minneapolis winning 5 titles back in the late 40s and early 50s. They'd had more than their fair share of Hall of Fame calibre, all time great players, guys like George Mikan, Elgin Baylor, Wilt Chamberlain and Jerry West. The problem was that from the mid 50s to late 60s they were in the shadow of one of the greatest dynasties in sports history: Bill Russell's Boston Celtics. In dominating that era of NBA basketball they made the Lakers their Finals bitches beating them on the biggest stage no less than 7, yes, seven times. The relocated Lakers eventually broke their LA era championship duck in '72, went to the Finals the year following but didnt go back the remainder of the decade.

So anyway, Magic Johnson. Proven winner, won in High School, won across town with Michigan State (1979 national champs) and didnt stop winning in the NBA. Rookie season in the league, Lakers had made the Finals, leading Philly 3-2 with game 6 in Philly, no Kareem, the safe money is on the Sixers winning 6 forcing a 7th game in LA. Magic, the teams point guard starts at centre in Lew of Alcindor (plagiarized) and proceeds to score 42 points, grab 15 boards and 7 assists! "Rookie point guard plays at centre and wins Finals, then MVP!", probably the first and last time you will ever see those headlines. The Lakers continued winning throughout the 80s. After coaching and personnel changes (Riley in as coach, adding Worthy & Scott) they began playing a high octane, transition based offense with Magic pushing the ball down the middle of the floor forcing defenders to commit to stopping him whereupon he would dispatch a flamboyant no look or behind the back pass for an easy lay in. This "Showtime" style of basketball was so fun to watch the Chilli Peppers even wrote a song about it. In the half court they had a great inside-outside game as Kareem with his patented skyhook™ caused defences fits and Magic at 6'9" gave teams matchup nightmares: He could post up or shoot over smaller guards and beat similarly sized players off the dribble.

All told the 80s Lakers ended up winning 5 rings (and got that Boston monkey off their back, beating them twice in the Finals) playing in a great era for basketball as the NBA went from being a domestic afterthought to global product. The new decade saw a changing of the guards as Michael Jordan won the first of his championships in 1991 and in the autumn of that year Magic (having been diagnosed with HIV) announced his retirement from the game. Post Magic the 90s was a barren time for the Lakeshow but having been spoiled the decade prior their fans didn't have much cause for complaint. What highlights and what memories.

13. WALES - Rugby Union (1969-1979)

Achievements:
3 x Grand Slam (1971, 1976 & 1978)
8 x 5 Nations champions (1969, 1970, 1971, 1973, 1975, 1976, 1978 & 1979)
2 x Triple Crowns (1969 & 1979)

Coaches: Clive Rowlands & John Dawes

Key players: Gareth Edwards, JPW Williams, Phil Bennett, Barry John, Gerald Davies & Mervyn Davies.

***Thanks to the poster ooh aah for the following writeup***

The first team was really made by the back row in many respects. Mervyn Davies effectively did all the donkey work that would normally be shared by the No 8 and the blindside flanker. This meant both Dai Morris and John Taylor could play together, with Taylor getting to the breakdown quickly, like a typical no.7, whilst Dai Morris was given the principle job of following and supporting Gareth Edwards, hence his nickname 'the shadow'. This was possibly the most important factor in what made that team so effective, and in the amatueur era of limited coaching, and zero tactical analysis, it took teams a while to figure out just how important the Edwards-Morris combination was. The extra mobility of the back row gave extra space to the much celebrated backline. The centres, Arthur Lewis and John Dawes weren't that spectacular, but were well balanced, and Dawes was considered a particularly good leader. What made the backline special were the other players - JPR broke the mould as a full back, being far more dynamic in attack then his predecessors, his appearance in the line created extra space out wide for the wingers. Barry John was of course a special player, but the crucial factor was Gareth Edwards, who was the one who often controlled the game, allowing John the freedom to do what he wanted. In some ways this team introduced things which would become commonplace in the modern game - in particular developing the role of the full back and scrum half as offensive attacking weapons. But in other respects it was old fashioned. The front five weren't that dynamic in the loose, and were regarded principally as set piece ball winners.

Between 1974-5 this team was gradually replaced by a new team. In terms of tactics and playing style it was more recognisable to a modern team. The front 5 were much more significant in the loose - Faulkner, Windsor, Price, Alvin Martin, and Geoff Wheel not only did well in the set pieces, but also got involved in open play more quickly and more often than their predecessors had done. The backs were even more dynamic. Phil Bennett could attack from deep better than anyone, as well as being an extremely reliable goal kicker. Gravell and Fenwick were a very good combination in midfield, with Gravell being used to great effect on the crash ball, adding a new dimension to the backline. John Bevan was replaced by JJ Williams, who was quicker, and could use his feet to great effect. I don't think any winger has ever been able to chip and chase, and control grubber kicks as well as JJ. They were also a bit more streetwise than the other NH teams, with more of a ruthless, win at all costs attitude. But as with the previous team it was all knitted together by Gareth Edwards. He was the one who dictated the game, and controlled the backline in a way more reminiscent of a fly half than a scrum half. He had great upper body strength, meaning he could take on the opposition back row at the breakdown which few other scrum halves could do at that time, had great pace and acceleration, a natural try-scoring instinct, and crucially combined these skills with tactical nous, and great decision making. Even after all this time I still think he's the greatest rugby player ever.

12. BARCELONA - Football (2004-present)

Achievements:
3 x Champions League (2005/06, 2008/09 & 2010/11)
2 x FIFA World Club Cup (2009 & 2011)
2 x UEFA Super Cup (2009 & 2011)
5 x La Liga titles (2004/05, 2005/06, 2008/09, 2009/10 & 2010/11)
1 x Copa Del Rey (2008/09)

Coaches: Frank Rijkaard & Josep Guardiola

Key players: Lionel Messi, Andres Iniesta, Xavi Hernadez, Carlos Puyol & Ronaldinho.

2003 was a pivotal year in the recent history of Bacelona, an election year that saw Joan Laporta voted into the office of Club President on a promise to bring Beckham to the Nou Camp. Ordinarily politicians who break campaign pledges are vilified but Laportas failure to land Becks™ was not about to become his "No more taxes" moment. Instead of getting a deadball specialist on the decline he got as a consolation prize Brazilian highlight reel Ronaldinho. Marrying Ronaldinho's game breaking skills with a bumper crop of talented players schooled the Barcelona way in the clubs La Masia academy saw Barca win their first league title in the 21st century in his second season, their 2nd European Cup in his third. When Ronaldinho became more interested in partying than playing football the torch was passed to 2005 world youth Cup winner and La Masia grad Lionel Messi. The bottomline here is this: Barca have since won 2 more European Cups with Messi and in the process have made opposition footballers look like kids playing with their Dad in the park. A slew of records have been or are being broken and Messi is making a compelling case for the title of the worlds greatest ever player. Their style of play is reminiscent of Ajax in their Cruyff inspired heyday and its no coincidence since Cruyff's total footballing philosophy was transplanted into Barca's DNA in the 70's. As long as Messi stays injury free they'll be among the favourites to win the Champions league season in season out for a few years yet.