If you keep the Mbuna population low and load up on male haps, you should be good. ( I think that seconds Joea) Skip the females for the Haps. Peope who tell you otherwise are Mbuna people. Haps, and especially peacocks don't work by this rule. Males will show to themselves and keep their colors nice. Females will add agression to the tank that you do NOT want.
There are some touch peacocks and haps you can put in the Mbuna tank, but they won't show their potential, but if you keep 1 demasoni and some Mbsobo in your 5' tank? That will work.. and I say this because I've done it. (actually, I've found 2 demasoni work in a 6' tank).
As a matter of fact, you're probably chosen two that will actually show their best colors in with a bunch of haps(yellow labs to OK), most mbuna I've tried in with a large number of haps have trouble showing their color.
Of the fish you listed:
c. azuerues, I like them but they need to feel more comfortable to show their best.. so I give the edge to S. Frieri for the blue color.
c. moorii : meaner than you think! I have a 4" guy that picks on a 7" Tyranochromis.. and everything else in the tank.
p. sevenei taiwan: Just beautiful, one of my favorites
p. taeniolatus: You mean Red Empress? Beautiful fish, but can have a nasty streak, I had a hyperdominant one that could take over 2/3 of the tank! meanest fish I've owned. He's been replaced by a more 'laid back' version. Nice fish.. a must have.
a. baenschi: I've never had one that has shown colors like in the pictures, they also don't seem as hardy as other species, I've had a hard time with these. I'd suggest a Flavescent and Blue Neon for some yellow peacock and throw in a nice yellow lab for pure yellow, you won't get that color from this guy.
a. stuartgranti: really like Ngara, Mbenji, Flavescent, Undu(blue neon).. and the line bred 'rubescens/ruby red'
o. lithobates: Nice choise! doesn't get too big either.. mine sort of stays to himself, but surprisingly, he's not the eye catcher I thought he would be in my tank.
p. electra: Deep water hap! cool fish, doesn't get too big.
So I think I agree with your stock list escept for teh Baneschi.. which more power to you if you can make him work.
I'm going to suggest the Huresi(midnight peacock), T. Intermedius(some call a hybrid), Ruby Red peacock.. and I'm fond of Jacoberfeibergi 'lemon jake'. Oh.. and the Placidochromis Phennichilus! LOVE THAT FISH! But you're somewhat limited in size.
I've found A. Banechi(sp) to be one of the less hardy and agressive peacocks... I've had some trouble with them in a variety of setups.
Check out these photos, many of these fish have shared a tank.