AN inanimate statue. Kinshiro cant move because he has the speed of an inanimate object but than starves. :D
Skill wise (assuming thats what your going for) Gamora potentialy. Gorgon could turn him into stone. His biggest feats i beleive are from the FOTNS movie where he and rao are destroying city blocks and whatnot with their hokotu shinken powers.
Because of his training any sort of poison.
Ken can counter any sort of solid thrown object.
Hell ken can make you forget your whole life.
Ken can touch you and make you kill yourself.
ken can void his souls with ultimate sorrow or some such shenanigans and channel the spirits of dead warriors learning pretty much whatever fighting technique he wants.
Useing a similar technique Kenshiro can performs a soul destroying chi blast.
So voltron comes to mind :P