Gods & Godslayers
Myria (BoFs) vs. Fou-Lu (BoFIV): He always struck me as more powerful. Considering the Fou-lu we see most of the game is one who is not at full strength, and even after getting beaten he's still perfectly fine, going to give him the nod. Also, I kneejerk that Ryu4 > Ryu3 on plot (one is a God, the other is not; Ryu4 even has the help of all the other Dragons, who are more powerful than BoF3 dragons being each a god themselves, to counter the Infinity Gene hype.), and Fou-lu trounces him far better than Myria holds up against Ryu3.
Either way, good fight.
Rozalin (Disgaea2) vs. Loki (VP): Can't vote.
Godlike
Kuja (FF9) vs. Dracula (Castlevanias): Kuja we KNOW can blow stuff up on global proportions; from what I understand, Dracula at best can do so in theory and even then, could be overselling him.
KOS-MOS (XS) vs. Bhaalspawn (BGs): Can't vote. Well, I kind of can, but didn't play enough of BGs so...yeah.
Heavy
Rubicant (FF4) vs. Citan (XG): Rubicant beat Beselk, zuh? Bah. If nothing else, Citan has the whole Water Affinity on his side to counter Rubicant with oodles of plot backstory badassery and such. Rubicant just kicks Edge's ass and has "I am the strongest fiend!" which doesn't apparently mean a heck of a lot (the other 3 are pretty undefined in power barring the nature of their powers.)
Jade Curtiss (TotA) vs. Ashley Winchester (WA2): Can't vote.
Middle
Cherenkov (XS) vs. Rena (SO2): I have no respect for Rena's powers still. Again, I stand by that "ANCIENT RACE!" thing doesn't go very far when all it amounts to is "She can heal!" since Expellians had Heraldry and such too.
Tio (G2) vs. Jean (Lunar 2): Kneejerk. Jean's pretty badass when she gets serious, a bit more defined than Tio.
Light
Lucia (Lunar2) vs. Seifer (FF8): Seifer, again, is fairly competent when it comes to combat. Lucia without her full powers is iffy at best.
Tony (WA4) vs. Ozzie (CT): Kneejerk says the leader of the mystics beats some guy who can't beat a bunch of children DESPITE a large mech. If nothing else, Ozzie's little Barrier thing is not facing a switch <_<