You can mix some haps and peacocks with the less aggresive mbuna such as yellow lab. and both species of Ps. Acei.
Most protomelas species can handle being house with mbuna as can others such as Venustus and other nimbochromis species.
If you are looking at adding some peacocks try to stick to "Jacobs". They have reasonable aggresion issues like mbuna and can hold their own. Most other peacocks like the Baenschi are just a little bit to dosile or soft to mix with mbuna.
Less aggresive Mbnuna X Stronger hardier Haps/peacocks :thumb: