There's a truism in music that the greatest technical exponents of a particular instrument are rarely its most engaging composers or improvisors. There are a handful of glaring exceptions to this rule - John Coltrane, Keith Jarrett, Michael Manring... And Renaud Garcia Fons.
He's a French double-bassist, who was around on the esoteric French jazz scene for a while before forging his own path playing a beautiful mixture of jazz, chamber music and middle-eastern flavoured folk. His compositions are outstanding, his choice of musical associates is exceptional, and his bass playing is genuinely beyond anything I've ever heard anywhere ever on the instrument. Few bits of music have ever made my jaw physically drop. His tunes regular induce that reaction.
Here's a vid on youtube, but pick up any of his albums - Entremundo, Oriental Bass and Arcoluz are all outstanding.