[Jennifer]

It's kind of a shame that The Great Mouse Detective and Oliver and Company are usually overlooked by most people as the "Disney Renaissance" was said to start with The Little Mermaid.

Personally, I'd say it started with The Great Mouse Detective, as that was the movie where Disney started going back to Walt Disney's desire to push the technology forward while keeping the story solid. The Great Mouse Detective was the first Disney movie to combine moving 3-dimensional objects made from computer imaging software with hand drawn animation (not counting John Lasseter's Where the Wild Things Are pitch, which was brilliant and it's a shame it never got made into an animated feature).