Song of the South for me. I remember seeing at the theater as a kid in the early 70s. We saw it as a school group twice. I remember singing ZipADeeDooDah at school in music classs in preparing to go see it.
I also like Peter Pan as a fav. I love flying with Peter around Big Ben at Philarmonic at the MK.
As for all live action, The Absent Minded Proffesor. My DS11 still gives this one thumbs up.