Answer: billcosby

AnswerCrossword Clue
BILLCOSBYPortrayer of TV's Dr. Cliff Huxtable
BILLCOSBY"America's Dad"
BILLCOSBY2009 Mark Twain Prize awardee
BILLCOSBYActor in "I Spy," 1965-68 TV series
BILLCOSBY1987 Worst Actor winner