It should've been deidara. I mean think about it, he could've used his c-0 to blow himself up and take out everything within a few kilometers and then he would've regenerated and done it again and again... Kabuto really should've done that, but it would've ruined the entire plot
i think hidan is the weakest cos all he had is him syth and he has no jutsu's and you can just seal him or do what shikamaru (i think i spelt it wrong?) and he is gone.![]()
imo it is itachi but if u are talking about for evil it should be nagato