Xue Sheng
All weight is underside
But will the power of Chuck be enough against Ashida Kim? I know that Chuck is invincible, but so is Ashida Kim! If they should duel, it would probably be a truly epic battle, lasting for eons (they are both, after all, immortal)
Of course you now realize you have questioned the power of Chuck and not only can you no longer invoke his powers to protect you against Ashida Kim but you have angered him as well.
My only suggestion at this point is to wait for the inevitable for you cannot hide nor run from Chuck.