I've never attempted a comprehensive list, so I was quite surprised by the length.
Grateful Dead
Aerosmith
Queen
Roxy Music
Santana
Rainbow
Johnny Winter
Edgar Winter
Journey
Moody Blues
Dave Matthews Band
Pretenders
U2
B-52's
Berlin
Thompson Twins
Billy Joel
Ted Nugent
Pink Floyd
Plant & Page
Mahogany Rush
Collective Soul
Les Claypool
Joan Armitrading
Weezer
Crosby Stills & Nash
Lou Reed
Steve Forbert
Hot Tuna
The Who
Ominous Seapods
Little Feat
BB King
Kenny Wayne Shepherd
Macio Parker
Joe Pass
Buster Poindexter
Cracker
Fabulous Thunderbirds
Starz
Bonnie Raitt, Jackson Brown, Shawn Colvin, Bruce Hornsby
Commander Cody
Blotto
PJ Harvey
New Riders of the Purple Sage
