This little question is, of course, impossible to answer.  However, that won't keep me from taking a stab at it.  I've decided not to include some titles that I've mentioned time and again in other threads (e.g. Ordet, M, The Life of Oharu, Tokyo Story, and Les Vampires).  Here then are some alternates that are quite wonderful.

Day of Wrath
The Good, the Bad, and the Ugly
L'Argent (Bresson)
Late Spring
Umberto D