Stevie Ray Vaughan All The Way!!!!
the man has more feeling with one note, than others would have with the whole freatboard
really great blues player, gone for 11 years now
one of the only white blues players to be appreciated by the blacks
i suggest you buy his "instep" album, it is really like a whole blues guitar school
another people:
buddy guy, b.b king, johny winter, gary moore, clapton, page
hendrix, j.l.hooker and many others

basicly i dont think blues is about rhythm or beat or anything like this
it's about feel... you need to learn to play with your heart
and not the fingers
you dont need any complicated theory to play blues, you need to feel it
i know it is not helping much, but that's the way it works man...