Gary Anthony Williams
Gary Anthony Williams (born March 14, 1966) is an American actor. He's best known for voicing Uncle Ruckus on The Boondocks, Thunderball on The Avengers Earth's Mightest Heroes, Mongul & Mongal on Batman the Brave & the Bold, the Mutant Leader in The Dark Knight Returns two-parter, Mufasa on The Lion Guard, Dad McStuffins on Doc McStuffins and even an Optimus Prime parody on MAD.
Live-action-wise he's also been Abe Kenarban on Malcolm in the Middle, a regular on Whose Line Is It Anyway? and Bebop in the Michael Bay-produced Teenage Mutant Ninja Turtles: Out of the Shadows.