Well Zipadeedodah! Song of the South has at most 30mins of animation, and should not be in the same group as the 100% animated features MO, otherwise you may as well count Mary Poppins and Bedknobs and Broomsticks as animated features too.
As for the mix of live action/animated genre, 'Song of the South' would be third behind 'Who Framed Roger Rabbit' and 'Mary Poppins' for me.

Fairly recent Disney Animations I rate really high would be Toy Story and Dinosaur.
Toy Story 2 is a bit overrated by everyone, fantastic animation, really enjoyable movie but I couldn't stand the new characters, Jesse and Stinky Pete, they quickly got on my nerves.
Finding Nemo was very colorful and made me laugh out loud, I'll wait and see how this one grows on me.
Hugely underrated are 'Atlantis The Lost Empire' and 'Treasure Planet', two great Disney movies that sadly didn't do well at the cinema, but hopefully doing much better on dvd.