Godlike:
Myria (BoFs) vs. Xorn (G3): Yeah, Xorn destroys the world...but Myria never intended TO destroy the world, now did she? She did control it for a fuck long time, however, unopposed.
FLIPSIDE, the team that took down Xorn was a girl with special powers, and 3 kids, using limited powers of divine beings. MEANWHILE, Myria was only able to be taken down by Infinity, the Power of an Entire Race of Unfairly strong beings, *AND* with the help of her sister at that. Not to mention in one case, there were 8 and in the other, while only 6, it had a Guardian (no slouch in power), and a Woren who could transform.
Fou-Lu (BoFIV) vs. Yuri (SHs): Godslayer hype is ridiculous; its a title, not something to be taken seriously. Meta-God's powers are about as undefined as they come. Furthermore, lets not forget this little aspect:
Fou-lu gets stabbed by a Dragon Slayer, a weapon designed to murder Gods. HE LIVES AND LAUGHS IT OFF LIKE NOTHING. After tangoing with Ryu (another God, remember, if inferior) and his buddies, the only reason he loses is cause he accepts defeat of his ideals; he's still clearly strong enough and raring to go for more fighting, just sees no point in it as he finally understands Ryu's point, hence gives up.
Yuna (FFX) vs. Rozalin (Disgaea2): Can't vote. Though, Yuna would be pretty weak in a plot power tourney as it means without any Guardians, she'd be dead weight while she summons for the enemy to attack her, no <_<?
Dark Force (PSs) vs. Loki (VP): Dark Forces are beaten by Mortals on EVERY SINGLE OCCASSION, and are just mindless beings. Profound Darkness is a different story entirely granted, but Dark Force is simply just a dramatically inferior aspect of it. Loki, meanwhile, has the Dragon Orb and knows how to use it. The fact that it took the GODDESS OF CREATION to take him down says everything.
Godlike
Hrist (VPs) vs. Kuja (FF9): Why the fuck is Kuja not in the above Tier? In any event, Blows up a world likes its nothing. Hrist is damn strong, but can't compare (and no, holding the Dragon Orb for 5 seconds to blast away Freya doesn't count; she explicitly states she doesn't intend to use it for anything serious.)
Vormav / Hashmalum (FFT) vs. Dracula (Castlevanias): Dracula isn't exactly what I'd call that strong. I mean, yes, Belmonts are trained Vampire slayers by birth, but...they aren't exactly Godlike in strength either, and Dracula's running a pretty bad record against them. Meanwhile, Vormav slaughtered an entire castle effortlessly, and IIRC, he actually KILLED HIMSELF. IIRC, the way the Hash fight ended was Alma showed signs of not being Ajora, and Hash got paranoid so killed himself to help trigger it (while still seeming very much alive and ready to go at it some more; he didn't care, bringing back Altima was his priority, his own life be damned.)
Rose (LoD) vs. KOS-MOS (XS): Blows shit up dead in military proportions. Rose...can't really compare.
Bhaalspawn (BGs) vs. Jenova (FF7)
Heavy
Belselk (WA) vs. Rubicant (FF4): Strongest Quarter Knight > Strongest Fiend.
Citan (XG) vs. Galuf (FF5): Angel of Death > Mild Crystal use.
Lyon (FE8) vs. Jade Curtiss (TotA): Can't vote.
Ashley Winchester (WA2) vs. Georg (Suikos): Knight Blazer hype and all that (plotwise, he can use it whenever he wants, after all, and its shown to be that damn strong.)
Middle
Cherenkov (XS) vs. Demi (PS4): Kneejerk says those slaughters > Demi.
Drachma (SoA) vs. Rena (SO2): Drachma's a strong fighter and well trained in art of combat. Rena's abilities, as I said before, are pretty much "Healing is a unique trait!" and plotwise, it was pretty much used on others only.
Zalbag (FFT) vs. Tio (G2): Zalbag is one of the most powerful warriors in Ivalice. Tio is designed for combat and all that, but never actually shows anything to match.
Eclair (La Pucelle) vs. Jean (Lunar 2): Jean's pretty bad ass, Eclair...isn't really defined how strong she is, so yeah, Jean wins based on that.
Light
Lucia (Lunar2) vs. Gobi (BoF): Lucia isn't this weak by the end of Lunar 2. When I say "By the end" I at least mean "right before she absorbed all powers of everyone" naturally. She's not up to her full strength, but she's stronger, than say, Rena Lanford above.
Hammer (XG) vs. Seifer (FF8): Seifer has combat experience, uses a legit weapon, and actually ISN'T THAT STUPID when it comes to combat. Again, Seifer =/= Light plotwise. He's good enough to be SeeD, just lacks the discipline (pretty much implied in how he's roughly Squall's equal in combat.) Hammer...has one instance where he pulls a gun on someone...which was basically backstabbing after he gained their trust. When facing someone he's never met before, that's not helping him.
...oh yeah, there's also "Seifer slices Odin in half" thing <_<
Liz (WA2) vs. Tony (WA4): Liz can defy logic all he wants, he still can't take on a mecha.
Shir Gold (PS2) vs. Ozzie (CT): Plotwise, Ozzie's pretty bad ass when he's not being a coward. Shir...is a completely average human girl with no real combat experience.