Git-ar (no order):

Jimi
Eddie
Jimmy
Slowhand
Robert Johnson (he is the "/" in the rock guitar filesystem.)

Thumpers:

James Jamerson (insanely driving triple-stop grooves. Good golly.)
John Entwistle (RAWK bass starts here.)
Larry Graham
Geddy Lee
There's like a dozen others that could be here. I can't pick one.

"That's some catch, that Catch-22." "It's the best there is." M22ti VP150 EP350 QS8 M3Ti