Hard to give straight answers when it comes to CA cichlid communities. It is basically a balancing act that you have to get the hang of, and will most likely take a bunch of trial and error. It's pretty unlikely that it will work long-term if you just toss a handful of CA cichlids into a tank. Usually you have to move fish around and let them work out a hierarchy, which still might change.
What I would personally do, is keep the loisellei as the centerpiece fish (largest fish) and keep a group of smaller fish like cryptoheros/amatitlania species with him. The Loisellei will probably not see the smaller guys as threats and won't kill them. Plus you get to have lots of fish, as opposed to three or four.
What I would personally do, is keep the loisellei as the centerpiece fish (largest fish) and keep a group of smaller fish like cryptoheros/amatitlania species with him. The Loisellei will probably not see the smaller guys as threats and won't kill them. Plus you get to have lots of fish, as opposed to three or four.