I'm guessting Gambino, but I'd expect more from him.
Its a lot like a swole alter, just a really shitty version of one. Not funny, not intelligent, etc.
Actually my final guess would be, its swole after getting into a brain damaging car accident or something, iamkimjong would be a likely result of that sort of trauma.
I'm voting O---a. When an asshole is up for debate I always vote O---a. Shitty sense of humor, and has problems with the same people (lestat, hammy, that I've noticed so far), also likes some of the same people (coldblue), O---a loves to talk in third person too.
Finally, he ran away when he got bombed a few times.