I know I have a soft spot for military/military related movies being a veteran and coming from a military family so I may be biased but if y’all don’t mind an older movie check out The Best Years of our Lives. It came out in 1946 and is about 3 guys from the same town returning home after WW2 and picking up where they left off.
It may sound like a boring premise but I promise it’s an excellent movie. I know it’s currently available on Pluto TV.
I might only suggest to add Sunset Boulevard (1950) and The Killing (1956).
Sunset Boulevard is an absolute classic, but The Killing is frequently overlooked as a sort of "practice run" for Kubrick (as we're the other Noirs he directed early in his career).