I don't have too many to recommend, but a few that I believe haven't been mentioned yet:
Travelling actors (1940) - A very solid work that comes from a very simple setting. It is a light comedy but it develops some really interesting themes about the frustrations of a group of actors who believe that their work is not being taken seriously enough. The comedy is quite good and there's some little background drama that works surprisingly well.
Brothers and sisters of the Toda family (1941) - I like this one a bit less than the other Ozus I've seen, but it's still a solid character drama about the interrelationships of a family. The dialogues are amazing in this one.
Cat people (1942) - A very solid low-budget horror that manages to be both disturbing and elegant. Its "male" counterpart
The leopard man (1943) is equally great.
I walked with a zombie (1943) - What can I say. This movie is just beautiful. A very stylized horror focused on the voodoo culture with some of the most disturbing, yet incredibly mesmerizing imagery I can remember.
Sahara (1943) - A war film set on the suffocating environment of the Sahara desert, that makes a wonderful use of that setting to tell a story of survival and despair. A bit heavy-handed with the propaganda themes, but they are not difficult to ignore in favor of the genuine tension and immersive storytelling it manages to bring.
The Ox-Bow incident (1943) - One of the most powerful allegations for presumption of innocence I've ever seen, and one of my favorite westerns overall. Just everything about this fairly short moralistic tale is amazing.
Dark waters (1944) - A solid claustrophobic thriller that makes some nice use of its environment and sets a good mystery; however I think that the film gets even better once this mystery is solved and particularly its last part is amazing.
Lifeboat (1944) - A classic Hitchcock film set on a single location that grows into a very compelling psychological thriller.
Cinderella - Zolushka (1947) - Okay, this one may be a risky recommendation, but I was completely blown away by the visual storytelling of this Russian version of
Cinderella, how well it captures the fairytale setting, how bright and colorful it is, and its fascinating imagery.
Children of the beehive (1948) - Not that I remember it very well, but it is a very solid slice-of-life drama about childhood that stands on its own in front of the Ozus, Naruses or Mizoguchis.
La terra trema (1948) - A staple of Italian neo-realism, with non-professional actors to represent the fight against explotaition from the point of view of a fisherman who decides to stand against the system and try to work on his own.
Living in shadows - Vida en sombras (1948) - The movie is incomplete, sadly, but it is truly a very hidden gem, one of the most unique films to ever come from Spain. A great main performance in a very quirky experimental and metacinematographic narrative.
Portrait of Jennie (1948) - One of the most unique classic melodramas I've seen. I won't spoil anything about the story and its quite creative take on romance, but the visuals alone... Damn, just look at this:
Raw deal (1948) - A sleeper gem of the noir/crime genre, though more of a love triangle. It may be one of my favorite noir films, though what I'd like to emphasize the most is the strength of its romantic drama, with three amazing performances, complex characters and clever dialogue.
They live by night (1948) - A classic story of love, crime and running away from justice. Very solid, what I loved the most was how perfectly accurate a lot of the dialogues seem and how well they capture the inexperience and awkwardness of a first love; sadly there's a bit of a drawback there because some of them look, in contrast, theatrical and unrealistic.
Diva Bára (1949 - A beautifully shot pastoral drama directed by Vladímir Cech, with some astounding images, a really compelling main performance, and overall a very strong storytelling.