Grigori, from Dragons Dogma.
Immense, powerful, intimidating and intelligent with an awesome voice and no patience for dipshits. And, for a Dragon, he is actually an alright guy. I mean sure he tries to burn down your home and then tears your heart out and eats it, but thats just general Dragonning. It's his dayjob really. After chatting with and eventually killing him, i really felt that in the entire game he was the only character who actually understood and respected me. And he is so helpful, not many bosses shout encouragement as you fight and kill them.
And a fantastic boss fight. Of course, it helps that Dragons Dogma's combat seems to have been built around boss fights.