Get some Buccochromis Nototaenia or any of the buccochromis man you'll love them!! They are really active. I have a fusco,fossochromis,tyrannochromis macrostoma,Chilo. rhoadessii and to name a few and they are all awesome predators.
LAMPROLOGUS ELONGATUS or MALAWI EYEBITERS. Had a colony of Eyebiters in a 8ft tank with Frontosa. The dominant male is really striking when they color up.