Little Big Man is probably a good example (haven't actually seen it), and I don't know what happens in Run of the Arrow, but we're not talking about just going native or making a friend out of an enemy. We're talking about actively "betraying your race". That's the DwW/Fern Gully/Last Samurai/Avatar story.
Well, no you are talking about actively betraying your race, I was just giving examples to stories similar to if not exactly like Dances With Wolves. Such as the one that some believe DWW actively rips-off. I didn't see your reply before posting mine so I wasn't arguing against it, I was replying to Squiggly just like you did
Trailer for Run of the Arrow