I can tolerate most Coen Bros. comedies, but TBL is highly overrated (imho). A Serious Man is utterly brilliant.
Stalker is one of my go-tos, as is Nostalghia. Tarkovsky has shaped my worldview.
The Seventh Seal.
Ashes of Time Redux.
I remember being intellectually impressed by La Jetee. (Read the other comments on your post, was like, "Oh yeah!")
A Man Condemned.