Ani Difranco/A Tribe Called Quest (just doing one is too hard...)
Beatles/Bob Dylan/Bob Marley
Citizen Cope
Dispatch/The Doors/Dr. Dre/Devendra Banhart
Elliot Smith/Elton John
Fugees
G. Love and Special Sauce/Grafh/Grateful Dead
Hendrix, Jimi (I know it belongs in J shut up it was all I could think of right now)
Iron & Wine (!)
John Butler Trio/Juelez Santana/James Brown/ JUSTIN TIMBERLAKE.
Kanye West/Kenna/ Kimya Dawson
Led Zeppelin/ Louis Armstrong / Lupe Fiasco
Mindless Self Indulgence/Modest Mouse/ Magnetic Fields/ MARVIN GAYE
NOTORIOUS B.I.G./ NIN/ Nina Simone
O.......
Pharcyde/ Portishead
QUEEN (duh)
Regina Spektor/ Radiohead/ Ryan Adams
SOUL COUGHING/ S.A.S./ The Shins/ Stevie Wonder
TOOL (!!!!)
U........
Van Morrison
Will.i.am/ The Who.
X....................................
Y.....................
Z..................
....and I'm going to add another category:
0-9 : 2Pac