Since this year's dunk contest is entirely based on fan votes, I bet LeBron would win by doing simple one-handed dunks.
A lot of LBJ dick riders would consider it the GOAT dunk contest.
Anyway, Chase Budinger isn't a bad dunker at all. I remember him in a high school dunk contest several years back. He didn't do anything noteworthy, but he did win. I think that's what's most important.