A day late, and a silver dollar short but happy birthday to Dickey Betts! As Duane said, "I'm the famous guitarist in the band but not the best guitarist in the band".
I don't know who the best guitarist of the rock and roll era is... Hendrix, Clapton, Stevie Ray, etc. arguments can be made for all. But the _two_ best guitarists to ever play together were Duane Allman and Dickey Betts: