This is a collection of Instagrammer strykerkun's impressive Disney hero cosplays (link goes to his Instagram with a ton of other non-Disney related costumes). As you can see, he really nails the faces. How does he do it? I have a theory. "Does it involve one of his parents being an actual cartoon character?" Yes it does.
Keep going for a handful more, including Simba.
Thanks to Allyson S, who agrees the key to good cosplay is believing you're the character.