Lebron is at a very unique position in the history of the game.
He can go to every position and outplay a great majority of every position player at their position. 100% of the wing players - that's his natural position. Maybe 98% of PG's. PF's and Centers? I don't know.
Who gives him the most problems at their position? What position he has the most problems with? Who makes up the mysterious 2% or whatever it might be.