Fake heart attack gag in Sanford & Son ...
killed him. Only made 7 episodes of The Royal Family then died on set.
https://www.imdb.com/title/tt0101187/
Trivia
Redd Foxx suffered a fatal heart attack during filming of an episode for this series. Due to a running gag from his earlier series Sanford and Son (1972) (where he would often clutch his chest and fake having a heart attack whenever things did not go his way), no one on the set took his legitimate complaints of chest pains seriously until it was too late to save his life.