Nice to meet you. :-) The tank looks good. Lots of rocks and caves, just what they need.
Tried to leave a comment but it wont take for some reason.
The one you have listed as an albino peacock looks more like a albino zebra. Hard to say which one because they can all look so similar. It has the body shape of a zebra instead of a peacock. That is a good thing tho, because you don't want to add a peacock in with the Mbuna you have. They are not aggressive enough.
The light blue one with dark bars you labeled unknown is a Kenyi. They get very aggressive. If it stays blue its a female. If it turns yellow its a male.
"Unknown Mature Male African Cichlid, Breed Is Unknown, If You know Please Advise." Very beautiful fish, but like none I have seen. Most likely it is a hybrid of two different kinds.
You do know that Melanochromis auratus are the MOST aggressive African Mbuna there is right? When they start to breed, all your other fish are going to be in real danger! So watch them close.
Here is a very good place to look up the profiles for the fish you have and to try to figure out what the ones you don't know are.
http://www.cichlid-forum.com/profiles/c ... .php?cat=2