Sam 'Ace' Rothstein (Casino)

If you're not arguing that Sam 'Ace' Rothstein from Casino is peak De Niro, are you even a fan? The man redefined the art of running a casino without breaking a sweat, all while rocking some of the most questionable suits known to man. It's not just a performance; it's a master class in control, from his meticulous wardrobe choices to that icy stare that could freeze lava. Fans get caught up in debates that last longer than the movie itself—because let's face it, choosing any other De Niro role feels like a betrayal to Ace's polyester empire.