I'd go with Fred Frith.
Constantly releasing great music since the late sixties, founder or member of about a dozen of the greatest bands ever.
Wonderful composer, very diverse, but still with a very recognizable style, as well as one of the greatest improvisers ever.
A multi-instrumentalist who plays mostly guitar, but also bass, violin, piano, drums and some other stuff and also sings in a very heartfelt (although rather unprofessional
) way.
Also seems like a very nice guy.