Not sure if it's been mentioned, but Jamie Thomas. He doesn't strike me as the kind of person who was ever naturally gifted at skateboarding so much as being someone who grinds his way to proficiency at stuff through working really hard. And this isn't hating on him at all, I find that admirable. He just doesn't seem like an Antwuan Dixon type who did a kickflip the first time he tried.
Again, not hating. Also, this all depends on how you view the notion of talent.