Basically any character that's not an official Disney Princess/Prince, but are heroes/heroines.
Even though I think The Lion King is an overrated Disney Movie I really love Simba. As a child he's very funny and as an adult he's still amazing. I love how he tries to be as brave as his father, but later realises that you only need to be brave when you have to be.
From a popular character to a very underrated character. People says that Faline is only supposed to be Bambi's love interest, but I think she's more than just that. I love her high energy especially when she's a child. I also love that she isn't shy at all, not even when she's a child.
Out of all the young Disney heroes/heroines Pinocchio is my favorite. Normally I don't like characters who chooses to trust the wrong people, but Pinocchio is one of few exceptions because he's not very old and hasn't learned so much of the outside world.
2. Maid Marian
Another very underrated character, she's such a sweet and kind character. She reminds me of Aurora very much, both have very little screentime in the movie though Maid Marian has a good reason behind it, because Robin Hood is the main character in the movie. Both also dream of true love and have a similar personality.
Ever since I first saw The Hunchback Of Notre Dame Quasimodo has been my favorite character in the movie and my favorite Disney Hero. He's one of the main reasons to why I love Rapunzel because they both are very similar.