Blazing Saddles

Blazing Saddles is a movie starring Cleavon Little, Gene Wilder, and Slim Pickens. In order to ruin a western town, a corrupt politician appoints a black Sheriff, who promptly becomes his most formidable adversary.
A town—where everyone seems to be named Johnson—stands in the way of the railroad. In order to grab their land, robber baron Hedley Lamarr sends his henchmen to make life in the town unbearable. After the sheriff is killed, the town demands a new sheriff from the Governor, so Hedley convinces him to send the town the first black sheriff in the west.