I like most of these candidates, and with the exception of four, I think all of them would be great additions to the staff. After reading 2's description a little more, I think that s/he moved up on my list. I just really like that s/he posts in all areas, and I feel that s/he will eventually stop with the spamming.

A big problem I would have with 1 is that s/he does not interact well with the newer members. That is the only negative that I see with him/her, as originality is good.

I still favor 3 or 5 the most, but I can see how 2 can be a good addition to our group.