well, I would say Orochimaru because he's always puking himself up and so on. Danzou next because he willlingly allowed Oro to experiment on him and Madara 3rd because he didn't ask for it but he seems to be okay with Hashirma's face between his nipples -.-
I can't choose between Oro and Danzo. What's with Kishimoto, seriously? One guy had mouths on his palms and chest, the other had eyes on his arm, now we get a guy with a face on his chest. What the f*ck, Kishi?
Oro definitely. Everytime he would spit something out of his mouth.... It was so disgusting. And when he and Sasuke were in the Transfer thingy, the form he was in gave me nightmares. He's just.....words-cannot-explain.