My fave in terms of:
Power: Elidibs (hell, I hate strong as in Weigraf, but he totally outweighs him)
Story: Izlude: (give him some credit. He worked for his dad without knowing he was evil.
Zodiac: Elidibs (He gives me Zodiac. I give him praise for being a worthy opponent.)

My most hated in terms of:
Power: Weigraf (He's so damn strategic, it's not funny.)
Story: Vormav!!! (He betrayed the High Preist, and his own children. That's worthy of most hated!)
Zodiac: Queklain (Ugly, status-reliable, and just plain sick. Need I continue?)

And hell yeah! He was betrayed by Ramza's ENEMIES after he became one. I think it would be fair for him to be revived by Pieses like Malak was.