i'm much more of a cello guy (matt haimovitz, jordi savall, many more)
but for violin
Angella Ahn (but mostly ahn trio in general)
back in the day when i was choreographing i really enjoyed using Iva Bittova - loved the sounds she could create (works very well for video) ('no' to the obvious question from this video)
David Harrington, as much for forming Kronos Quarter as anything
they can really bring a warmth to some of the Modern composers (and we met them at a festival in Mexico which was pretty cool)
but i guess my answeranswer would have to be Laurie Anderson because she was the queen of 'oh, you thought you knew what the violin was'