Disney Timeline! I love all of these and its really hard to pick a favorite Disney movie, but I'd have to say that I like the lion king the most with beauty and the beast and the little mermaid close behind!
I love Frozen. But I agree it was not the first Disney movie to do all these things. But I do feel like it was the first Disney movie to address all of these things together. It made a point to go against the usual formula of a Disney princess movies and that's what I like so much about it.