Has anyone mentioned Doc Hollywood? (Warning: it does have one nude scene.)
The first one that came to mind (an oldie): “The Music Man”. But I can hear those boys groaning already.
Another oldie: “The 7 Faces of Doctor Lao”. Okay it has a white guy playing an old chinese (which brings to mind #3 below), but he does have a positive effect on pretty much the entire town.
Pretty much any episode of “Kung Fu” (okay, not a movie, but you have to admit Caine always helped communities).
I would not recommend “High Plains Drifter” as a “positive” example - more of a revenge movie. But a better Clint example would be “Pale Rider” (not sure if this is PG or not, though).
Similar to the story of the wannabe samurai in “Seven Samurai”, it seems there are a number of stories out there of people who help a community, but are not what they appear to be. This inevitably comes out (about 3/4 way through the movie), but in the end the community manages to overlook this and accept him as a savior anyway.
The only example that comes to mind is “Mumford” (about a psychiatrist who isn’t), but it seems there are others that I just can’t think of off the top. If I think of some, I’ll post them.
Cars is basically the same movie.
How about The Adventures of Robin Hood?
The Wizard of Oz and The Lord of the Rings