You know in Sherlock Holmes where occasionally Jeremy Brett would be playing some edgy violin music? Who are the best composers for this sortof stuff? Andy C? Statto? Ursus? Fitter Happier?
I've got plenty of King Of The Slums already, thanks.
A bit post-Holmes, but I reckon this Bartok sonata has a lot of the qualities of quiet distubed stream-of consciousness introspection that you're looking for.
It's difficult to imagine the great detective scraping his Strad for some lumpy Fenland step-dance tune from the repertoire of Eely Went, but there are certainly plenty of places you can go to hear music with a bit of otherness, mystery and bite. The spectral ringing strings of the Norwegian Hardingfele, for example - here is a fantastic fifty-year-old archive clip of an old traditional player.
The rest of Scandinavia comes up with music that fits the remit, too - this is a traditional polska (not a polka, mark you) that sounds all wrought and irregular despite being dance music. (The effect is heightened when, as is common, there's a second fiddle playing a second line.) See also Finland and Denmark.
I do actually play violin in a couple of The Exploits of Elaine tracks. Well, when I say play I mean I loop drones on one track and use the body as a percussion instrument on another.
Anyway, the following are all edgy in very different ways...
Pendercki's Threnody for the Victims of Hiroshima is fucking horrible. Full strings, not just violins. His violin concerto is stunning too. Cale and Terry Riley's stuff from the Theater of Eternal Music is awesome, although it's viola. Jean Luc-Ponty's violin lead fusion is pretty hot sometimes.
Martin Carthy is probably my favourite violinist (or fiddler). Great English folk fiddler (check out Fairport Convention's Liege and Lief) but with a good understanding of more experimental techniques (check out Martin Carthy and Swarbrick's Reynardine).
I can't see the exact same results as you, there, TI, but from doing a quick "Ysaye" search myself I would plump for the Zehetmair recording which seems to be listed as:
Sonates pour violon solo
Ysaÿe, Eugène, 1858-1931 Other titles by Author(s)
compact disc