This is a problem. First of all, some of these aren't species but families of fish, each of which contains many, many fish that are wildly different from each other (wrasses). Others are species that leave out more interesting fish in their families (Blue Tang vs. other more spectacular Tangs).
Second, so many are left out. My Lawnmower Blenny is this prehistoric looking, weird/cool fish. My Royal Gramma Basslet is one of the most colorful fish around.
So I can't vote.