Great shots Anthony. Have you bred the Mchenga? They're all pretty hot fish, but that guy's my favorite.
Arlene, pic two is a cyprichromis leptosoma. I believe it's a Utinta from the ocelli on the dorsal fin. Pic 3 is a cyprichromis microlepidotus, not sure which location, but maybe kilila. Pic 4 is a paracyprichromis nigripinnis. All are from Tanganyika.