Which character felt like the most overpowered villain in Naruto besides Obito?

[USSJ Future Trunks]

when pain first showed up and beat jiraiya.
that truly looked to me like an unbeatable motherfuker.

orochimaru also was very beastly in his introduction

 

[miromiro]

Pain clearly. That guy looked firstly incredibly powerful.

 

[Bad Touch Yakushi]

After the 6 Paths of Pain blew up Konoha...it didn't matter how strong Naruto had become at Mount Myoboku- he didn't stand a chance.

And if it wasn't for the Toads, Hinata & Kurama- I was right.