I admit that I almost wanted to say Yunalesca for FFX; for reasons, check out the Patricide essay I have on my Jecht shrine.

For me FF7 is really kinda a gray mashy of bad guys and Sephiroth only wins because -- well, he's just THE MAN of FFVII. Cloud pales in comparison.

I barely remember FFIX other than the plot kinda lost me in the 2nd life, LOL. And I haven't finished FFXII, so I didn't vote.

And if this makes any sense I'll be amazed because I'm tired as hell. :)