I see Belle as the perfect roll model out of all the Disney Princesses in my opinion. She was strong and though she was kind of twisted into staying with the beast, she didn't back down to him. She held her own. And she and Prince Adam's story taught us that love isn't about what's on the outside, it's on the inside, and that's a very valuable lesson to younger children.
Pocohontas was so strong, and she chose her family over love.
And brave focused on family bonds, rather than the princess falling in love.