Noah fon Ronsenburg. Probably a cop out answer because I've spent many many more hours playing Dissidia than FF12 and don't really remember any of the other judges in that game.

"You should feel ashamed!". I do, EoFF faithful, I do. Don't worry, I plan on giving this game a serious playthrough sooner rather than later.

Plus how awesome is this:

Dissidia 012: Duodecim - Gabranth vs. 000 Feral Chaos - YouTube

On a side note, remember back when FF12 came out and everyones custom user title was "I'm Captain Basch!"? One of the things I enjoy about this game is all the inside jokes it created with the forum members.