Could Gabranth really be categorized as a true-blooded "villain" though? I mean, people like Kefka and Emperor I can understand. But Gabranth? It's almost sort of disrespectful to his character to just lump him in as a villain with the others.
Now Vayne would've been a badass villain in Dissidia.
Dragons Pwned: Fafnir(FFXII), Yiazmat, Hell Wyrm, Bloodbane(VP:Lenneth), Divine Dragon(LoD), Fluffy(Dragonfable), King Ghidora(Godzilla: DaM), Mana Beast(LoM)
There's also that both the XI and XII rep are meant to be sort of "morally ambiguous." Shantotto is mostly a good guy with some... destructive tendencies, and Gabranth works for the bad guys but has a strong sense of honor and duty.
For those interested, here's some videos of Gabranth:
Him doing his EX burst: http://www.youtube.com/watch?v=PSHkZm5U8wQ&fmt=18
Some general gameplay: http://www.youtube.com/watch?v=DH4Y6QfkRJ0&fmt=18