So what position is the "artist"? Artist for what?
Just out of opinion, I think it would be a better if you were a main programmer alone, and asked for help from others, instead of having other's lead and you help with concept art, because the leader is normally the coder. Also concept doesn't seem necessary for a project (I never do it). Just my opinion.
And....
4 programmers?!
I'm at the head of a team, total for all jobs is three people.
You're going to run into problems with people being uncomitted, running out of time, or jobs clashing with other people's job. For example, with several modelers, many people may want to do the hero character and no one will want to make a car.
It's also a good idea to have screenshots before you ask for a team.
Uncle Sam
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