Chuck Berry is the real king. I think that Ichi's list is excellent, with a few changes:

John Lee Hooker
Little Richard
Chuck Berry
Jerry Lee Lewis
Elvis (Bah, never liked him, but...)
Bob Dylan
John Lennon and Paul McCartney and George Harrison
Keith Richards and Mick Jagger (AKA Hillbilly Bugger Boys)
Eric Clapton
Jerry Garcia
Jim Morrison
Duane Allman
Jimi Hendrix
Jimmy Page and Robert Plant
Pink Floyd (I think they should go after Jerry, if this is chronological...)
Bob Marley (Yes, it is rock...)

Not entirley sure where he goes up there, but Bo Diddley and Muddy ought to be there as well.