Well right now heres a few.
Blues - Too Slim & The Taildraggers, Buddy Guy, J.J. Cale, Guitar Shorty, Robert Cray
Rock - James Blunt, Jon Crosby, Vampire Weekend, Dave Pahanish, Matt Pond PA, Thomas Dybdahl, Paul Westerberg
Instrumental - Ehren Starks, Rob Costlow
Metal/Rock - TNT, Edguy
Guitar - Vinnie Moore, Yngwie Malmsteen, Joe Satriani, Michael Angelo Batio