Lucius Sweet
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Lucius Sweet (voiced by Paul Winfield) is a parody of Don King. (It was said that Sweet is "exactly as rich and famous as Don King and looks just like him too." Incidentally, Winfield also played Don King in the 1995 TV movie Tyson.) Sweet first appeared in the Season 8 episode "The Homer They Fall". Lucius learned of Homer's talent when Homer started boxing. He promoted Drederick Tatum (a parody of Mike Tyson), who ultimately defeated Homer.
Sweet also has a small appearance in the Season 9 episode "The Trouble with Trillions" and was also seen in the Afro-American church in the episode "Milhouse of Sand and Fog" as well as a guest at Krusty the Clown's funeral in "Bart the Fink".