Ironically, the most obvious example of this that applies to me would be LBT movies, but I guess we all know about that.
Other than that, there are some Disney movies that deserve way more love in my eyes, and those are
Atlantis: The Lost Empire and
Treasure Planet.
The steampunk/sci-fi aesthetic in them is so unique, especially for Disney animation, and the stories are creative, fun adventures even if they are sort of cliche at times. Sadly, neither of these movies was very successful in box offices, though, which means these days Disney just sweeps them both under the rug like they never existed.
I love them both, though, especially
Treasure Planet. At one point, I got into that movie so much that it led me to make one of the most fully-developed OCs I've ever created, plus a whole longfic featuring her!