I had like a list of way more than 43 movies (last count was 43, but I continued to list away and away). So, I'll just list the few that I can rank definitely:

1a - Friday Night (Denis)
1b - In the Mood For Love (Wong)
2a - Stalker (Tarkovsky)
2b - La Jetee (Marker)
3a - Chungking Express (Wong)
3b - Godfather (Coppola)
3c - Godfather Part 2 (Coppola)

interchangeable:

Simple Men (Hartley)
Annie Hall (Allen)
My Night at Maud's (Rohmer)
L'Eclisse (Antonioni)
Goodfellas (Scorsese)
Late Spring (Ozu, but I love all Ozu)
M. Hulot's Holiday (Tati, but I love all Tati)
Army of Shadows (Melville, but I love all Melville)
Celine and Julie Go Boating (Rivette)

Other stuff that I think people should watch (just off the top):

One From the Heart (Coppola)
Hypothesis of the Stolen Painting (Ruiz)
Happy Together (Wong)
General (Keaton; Bruckman)
Spirit of the Beehive (Erice)
Never Weaken (Newmeyer)