In no particular order:
Doc Watson
Tony Rice
Eric Clapton
Dave Matthews
Johnny Cash
I caught Doc a while ago, and for a blind guy in his eighties, Man can them fingers move!
Tony Rice, 'cause I likes a little funk in me bluegrass from time to time.
Clapton, 'cause he's friggin' Clapton.
Dave Matthews, I stare at that tab for hours trying to figure out how, exactly, I'm gonna grow another finger to play that chord.
and Finnally
Johnny Cash, for being a terrible guitar player.