Aggressive Psuedochromis tank mate possibilities?

[connordv]

I have a large and very aggressive psuedochromis that has killed 2 damsels (which is why I put it in their originally) 1 kole tang and 1 melenarus wrassse in a 55 gallon tank. I only have my 2 clowns left with him and I'd love to have something active and colorful for my tank before I depart for college. Any help or suggestions would be amazing!

 

[connordv]

I'm not sure the exact species of psuedo chromis however it looks very close to PSEUDOCHROMIS MARSHALLENSIS... I will take a photo when I'm home however thought I would ellaborate what type of psuedo I am talking about

(He's purple black body with yellow tail)