Just for fun I tallied the DeNiro flicks: forty-nine.
Greetings, Hi Mom!, Bloody Mama, Born to Win, Bang the Drum Slowly, The Godfather Part II, Taxi Driver, New York New York, 1900, The Last Tycoon, The Deer Hunter, Raging Bull, True Confessions, The King of Comedy, Once Upon a Time in America, Falling in Love, Brazil, The Mission, Angel Heart, The Untouchables, Midnight Run, Jacknife, We’re No Angels, Stanley & Iris, GoodFellas, Awakenings, Guilty by Suspicion, Backdraft, Cape Fear, Mistress, Night and the City, Mad Dog & Glory, A Bronx Tale, This Boy’s Life, Mary Shelly’s Frankenstein, Casino, Heat, Sleepers, CopLand, Wag the Dog, Jackie Brown, Ronin, Great Expectations, Analyze This, Meet the Parents, Meet the Fockers, The Good Shepherd, Stardust and What Just Happened?.
And that's not even with the fifteen or so all-out stinkers he's made in the last decade plus that I can't bring myself to have in my home, not even for completion's sake.
And Bobby D's probably not even the actor I have the most of, he was just easy to calculate sitting here at work.