But I'll bite anyway.
Milos Forman is a favourite of mine. Brilliant director.
Polanski, of course. Interestingly, I find his English-language films to be his best, with my favourite being Frantic. I'm probably the only one to think that.
There's a Russian director named Andrey Zvyagintsev who made a film called The Return, ten years ago. Great film, fabulous cinematography.
And there are others, but most of them aren't current.