Why not jtl005? He seemed like a good sport, and I bet he'd be willing to play and act impartially (or hell, he can try to kingmake if he really wants, I suppose, he could have done that just the same if we'd played it out on the day).
Failing that, I nominate you, theory, as the third player. I trust you to play at a similar level to any of us and to take the game seriously, and I don't think ednever has any reason to object to you more than any other player.