In the field of Black Comedy, the transition from Steppin Fetchit and Blackface routines was replaced by a new breed of comics that preceded Richard Pryor and Flip Wilson. There was the Tuxedoed Timmie "Oh Yeahhh" Rogers, whose humor touched on political and social issues and appealed to all races. He was a staple on the Jackie Gleason Show, Dom De Luise, Ed Sullivan, and other popular tv fare of the Sixties. Here's a clip from youtube. I was lucky enough to grow up on this man's humor. If you catch all the allusions in his routine, your age is showing.
http://www.youtube.com/watch?v=Utsu4SaySVw
AC