Willie Dixon, Muddy Waters, Howlin Wolf, Leadbelly, the great Robert Johnson, B.B.King, Albert Collins... there are so many to chose.
Plus the modern guys, Stevie Ray V, Jimmy Page, Eric Clapton, Gary Moore, Jeff Healey.
Listen to them all, use there songs, play 'em slow, play fast, funk them up they are all so versatile..a great education that every musician should try