(*Note - this does not have to be a main character, it could be as small as the shrimp Ursula eats, MMB, I don't want that to be your answer, I know you're a funny guy
I would have to say Aladdin, although Herc is kinda close after, though both are for kinda the same reasons...
I know what it is like to want something more than what you have(Aladdin) to feel like you don't belong, that there's somewhere else you should be(Herc). With each of these characters, but Aladdin especially, it's pretty much just him... he has to fight his own battles, and make his own path in life, noone is just handing to him. He is ridiculed by others for being a street rat, but deep down he is something so much more. Even when he is starving, he gives his bread to the children, or when he finally has Jasmine's love, and only needs the title [of prince], he wishes Genie's freedom, because he is self less. He is a bit naive, but keen no less, and adveturous. These are all reasons I can relate to Aladdin, and hey at the end everything works out, still waiting for my turn to ride off into the moon... with my princess...
And I even have some physical similarities, but not many.

