This is another one that's harder than it looks.

Charlie Chaplin was nominated for Best Comedy Director at the very first Academy Awards in 1928 (the only year the award was split into two categories) and Best Actor for The Circus, but at the last minute the Academy determined that he was "in a class by himself" and took him out of the running for the competitive awards by giving him an honorary Oscar for his "versatility and genius" for the film, the only time in Oscar history that a recipient's nominations were rescinded with the bestowal of a Special Award.

Chaplin's nominations stayed on the books for decades and listings of the nominations included him among the 1927/28 Best Actor and Best Comedy Director nominees, which (added with his nominations for Best Actor, Best Screenplay and as the producer of the Best Picture for The Great Dictator in 1940) make him the answer. But in recent years, the Academy has removed Chaplin's nominations for The Circus from its official roster because of his elimination in the final voting, which (with The Circus being Chaplin's only nomination as a director) makes Orson Welles the answer for Citizen Kane in 1941.

Or is he? The problem is that the Academy didn't acknowledge the producer of the Best Picture as a nominee until the early 1950s. Prior to that, the movie itself was the actual nominee and the Oscar statuette was typically collected by the studio head, which makes the first person to officially be nominated as an actor, director, writer and producer to be Warren Beatty, who was nominated for all four for Heaven Can Wait in 1978 (adding to the producing and acting nominations he received for Bonnie and Clyde and his writing nomination for Shampoo).

So who'd the final word? Welles usually get the credit and we're okay with that but we also think Chaplin got a little screwed on having his nominations for The Circus rescinded and there's no doubting that Beatty is the only one of them who is on the the Academy's official records as being nominated in all four categories. So there you are.