That would be an interesting list: good dance movies. Well, there's a distinction between good dance movies and enjoyable dance movies. For example I really liked watching You Got Served but it wasn't a good movie by any stretch.

Billy Elliott
Shall We Dance? (Japanese version)

uhh, I'm out :)

Seems like the key is that the dancing serves as a framework for a beautiful story about people, instead of being the raison d'etre.