ChilDawg: thanks for posting some common names for those cichlids.
As for schooling/shoaling fish to add to a tank with some of these smaller cichlids, my first bets would be neons and rummynose tetras, as their schooling behavior is so pronounced when under a minor threat. I am also partial to Garnet tetras, Red Phantom and Black Phantom (note: not the same as Black Skirt) tetras, Emperor tetras (not good schooling fish, but interesting nonetheless), and Green-Eyed and Harlequin Rasboras.