Quite a bit of dwarf mbuna to choose from.
Iodotropheus Sprengerae (Rusty)
Pseudotropheus polit
Pseudotropheus Saulosi
Cynotilapia afra (cobue or mbweca)
Pseudotropheus daktari
Pseudotropheus demasoni
Pseudotropheus msobo
My favorite is the Saulosi. Great fish to have. Males turn a beautiful blue with black stipes and the females stay a golden yellow. Fun fish to watch and are not too aggressive. I used to have an 75 gallon saulosi species tank with 3 males and 12 females. One of my favorite tanks.
Rusties are nice fish as well. You pretty much can keep most of the mbuna species in that tank if you keep the male to female ratio (1M, 3-4F) No more than 2 or 3 species however. And stay away from the very aggressive mbuna.
A nice setup would be Saulosi (1M, 4F), Rusties (1M, 4F) and maybe 3-5 Acei (male to female ratio doesnt matter too much with these) This setup will give you some blue,yellow,purple, and rust colors.