Both LeBron & Wemby at 22 took down heavily favored teams with title winning cores in the Conference Finals. It's not a totally 1:1 comp since Wemby has a better team than LeBron did, and his Finals was much more up for grabs than LeBron's was, but regardless, both overachieved mightily even without a ring to show for their efforts.
Contrast this with Michael Jordan, who got his ass kicked until he had the best team & all the title teams from the 80's fell off. He won when he was expected to win, but unlike LeBron & Wemby, he never won when he was expected to lose, and I think there's something to be said for that.