The Champsocrhomis will be pretty big in that tank (they're big in any tank), but should work. I was speaking of the Copadichromis "green face fluorescent". I have them, they're not overly aggressive, which may be a problem as the rest of your list is on the aggressive side for haps, I've got one in my male tank who's doing alright, but the most aggressive fish I have is a red empress, which is modereately aggressive in comparison to some of yours on the list.