Can't pick one I have to pick 3 Spielberg, for just the shear amount and turnover and some great films. Scorsese for his utter brilliance. And Stanley Kubrick for every film he has made.
Kubrick, Audiard, del Toro, Capra. I think I'm the only person in the world who doesn't like Scorsese's films.
Speilberg Chris Nolan Tarantino I like JJ Abrams, Scorsese and even Ben Afleck too off the top of my head.