Its a Labeotropheus trewavasae the top lip hangs over dead give away
oops theres more pics ( slow connection in hotel )
1 Labeotropheus trewavasae
2 not sure a peacock of some sort
3 could do with a head shot but its got some horid marks on it
4 hongi ?
As you already know your mix is way off and your ph is to low. i would consider sorting your stocking out ,the bumblebee kenyi and trewavasae are very aggressive and the peacocks are wimps sooner or later its going to get nasty in there, You should research the fish then buy it ,not buy it stick it in the tank and then ask what you have brought.