basically most everything Kurosawa but Seven Samurai is such a top-to-bottom masterpiece.

Similarly, I love almost everything Miyazaki, but Lupin III: The Castle of Cagliostro is the best adventure movie ever made behind Raiders of the Lost Ark.
Bonus award to Battle Royale. I saw that in a movie theater last year packed with a thousand movie geeks and that was goddamn incredible.

I'm slowly seeing more Korean movies, but my knowledge of European films (outside the UK) is pretty limited.