He made his mark. Guillaume, known most recently as Isaac Jaffe on Aaron Sorkin’s Sports Night, was the first Black man to win an Emmy for lead actor in a comedy series. The St. Louis native won that award (and another for supporting actor) playing the role of Benson DuBois on Soap and its spinoff, Benson. He also won a Grammy as the voice of Rafiki in The Lion King. Guillaume’s wife confirmed that he died yesterday of complications of prostate cancer after a six-decade career in TV, film and theater.