Definitely not Cletus. He's never been very creative or resourceful--just deranged and sociopathic.
Rorschach and The Joker are both brilliant, but twisted, men. Both are very resourceful and both would know how to turn the inside of a prison to their advantage. However, Rorschach is an excellent hand to hand fighter, wheras the Joker's mostly untrained. Assuming they have no weapons, and assuming Rorschach catches up with Joker before he can reach the rifle tower, the clown gets pounded into the ground before long.