I don't like to guess. In my experience, true personalities are going to express themselves regardless of moniker. If I don't like the original, I generally don't like the knock offs. I don't like Hank so I don't like the original. That narrows it to three. TU, who doesn't have the necessary social skills or patience to pull it off.
Tcas, who is still an active member therefore doesn't really need to act as a ghost since he can still post.
Which leaves, s-love. He is currently banned and therefore would need to protect his identity as much as his limited capabilities would allow. He also has expressed the same complete lack of social awareness that Hank has already, so he would be my guess.
Hope that helps,
FDC
I figured azbob would be on your list as well, recall you not liking him either. Out of curiosity what did Tcas do? If it's going to drudge up something that should be left unmentioned than disregard. :0008

