Drop by Conspiracy on July 28. That band does versions of many of the folks mentioned in this post: Muddy, BB, Buddy Guy, Aretha, Ray Charles, Janis, Jimi, EC, SRV, Robben Ford, Blues Brothers -- including a whole bunch of other stuff by Albert Collins, Albert King, Wilson Pickett, Savoy Brown, Bonnie Raitt, Allman Bros, Stones, Joe Bonamassa, Joss Stone, Shannon Curfman, Skynrd, ZZ Top, Crowes, etc.
Of all these folks and their ilk, the most consistently bluesiest, oiliest, grasiest, gutsiest dude is........Albert King. As a blues guitar player, the man has no equal. All in the phrasing and attitude.