Bill did a marvelous HBO special "Bill Cosby Himself" that we still enjoy. You haven't really laughed until you watch it. I think this link is the one on YouTube.
Cosby was one of the icons of my youth, I had all his albums, I could recite all of his routines by heart.
But I even knew in the 70s with him being constantly at the Playboy Mansion, that his public persona didn’t match how he really is.