Thats a big size to add them at but it should calm down soon as for the breeding it could take a couple of months yet until the female feels safe and ready.
Your tank is a bit of an odd set up to have malawis in, the acra needs a low ph and the labs need a high ph the others should be ok but not perfect, normally a malawi tank is just malawis as not many other fish can put up with there aggression levels even labs are aggressive compared to most tropical fish.
If i was i would decide which way to go either a malawi set up or community.