Fats Waller, who was first a student and then a protege of James P Johnson, was considered the formost of the stride players. Having learned a GREAT deal of both guitar and bass from listening to boogie woogie piano players, my own personal favourite is Pete Johnson (no relation to James P). Both are dead but left many recordings behind. Jay MacShann, who excels at both styles and more, is still alive, active, and recording. He is well into his 80's now, but still can kick up a storm. Check him out at every opportunity you can.