Ramona (1928): silent, gorgeous - 1/2 native girl adopted by evil step mom is loved by son (badly remade in 1936), driven off by mom, suffers.
Navajo (1952): Navajo boy rejects the white man’s school in semi-documentary style flick from white POV. Infuriating that white POV is presumed proper, so worth seeing.
Devil’s Doorway (1950): U.S. veteran Indian tries to use the law to keep whites off his land. Recommended
The Exiles (1961): Semi-documentary of a night with Native Americans and their struggles. Sad and dull.
Powwow Highway (1989): Not perfect, but an interesting look at modern issues.
I watch 'em so you don’t have to. A bunch of movies about Native Americans in this mix (at end).
Native American movies: