(re)stocking my 50 gallon

have been keeping mbuna for a couple years. got tired of aggression. decided to go in a different direction. rehomed all my aggressive mbuna.

here's what i have now

(1) 6" blue ahli
(1) 4" yellow tailed acei
(2) 3" yellow labs
(1) 4" bumble bee

next up later tonight i'll be adding a couple of adult peacocks, like 5+" in size. i'm doing all males. one for sure is going to be a sunshine. the 2nd... (see below).

a) i can keep the labs and acei with them no problem right?

b) would it be a bad idea to add a lighter blue(ish) peacock? there's one i loved but it's similar in color to the ahli.

i really, really want to try to keep the bumble bee (i kept it because it has never been aggressive and it was my favorite), but if absolutely neccessary i have the option of trading it for more labes or acei about 3" in size.

thanks for the help. like i said i'm experienced with mbuna, but have never kept haps/peacocks.