Crow Sister, I personally think RJ and Leadbelly WERE legendary but here's a list of some contemporary bluesmen worth looking up on Youtube for the basis of comparison: Skip James, Son House, Blind Lemmon Jefferson, Lonnie Johnson, Big Bill Broonzy, Blind Blake, Tommy Johnson, Mississippi John Hurt, Bukka White and my personal favorite, Charlie Patton. There are many, many more but this is a good start. Note that I confined the list to other guitar playing male performers but there were some wonderful blueswomen of that era as well, Ma Rainey, Bessie Smith and Memphis Minnie, and vocal groups like the Mississippi Sheiks.