Pocahontas was made in 1994, I like that one. Sleeping Beauty (1959), Beauty and the Beast (1991), Aladdin (1992), The Adventures of Ichabod and Mr. Toad (1949), The Sword in the Stone (1963), The Ugly Dachshund (1966), Bedknobs and Broomsticks (1971), The Many Adventures of Winnie the Pooh (1977), and so many more.
Sit back, it's gonna be a long ride. - The Lion King The Nightmare Before Christmas Alice in Wonderland The Fox and the Hound Aladdin Mighty Ducks Mulan The Aristocats Robin Hood Tron And disregarding your 2000 or previous rule: Toy Story 1, 2, 3, every Studio Ghibli collaboration, REMEMBER THE TITANS, and even though it hasn't even come out yet, The Jungle motherfucking Book because it will be AMAZING. Yaaaassssss.
Definitely Fantasia. A psychedelic trip without the drugs, and a wonderful treat for the ears! I recognize two others as more popular (Cinderella and Snow White). I liked them, but not as much as Fantasia. Another "trip" move was Alice in Wonderland.
Disney produced movies of all different types and appealed to so many. For the Science Fiction fans of that time there was 20,000 Leagues Under the Sea. Musicals included Mary Poppins. Live action comedy included Haunted Mansion.
Probably the longest running sequel type for Disney is the Pirates of the Caribbean movies.