Wow, quite the thread here. This type stocking can and does work. But not without complete dedication, daily attention, and lots of trial and error. There are many who successfully keep and have kept this type setups for many of years(apparently just not on this forum). Below I will just give comments based on my experiences.
I would avoid allowing any of the fish to establish territories. Less decor or easily moved decor rearranged weekly during cleanings and water changes. This will help to keep from any one establishing a territory.
Avoid females, yes males tend to be more aggressive but females will form pairs. Even with other species or other females, then start spawning and creates turmoil. Heck, I've even had females lay eggs without being in a pair, but they will defend the nest.
You may have to try different individuals of the same species to find a less aggressive more tolerable specimen. Also behaviors can change as the fish grow, becoming more or less aggressive.
Have a tank set up to house bullies or injured fish, don't wait to make a move.
Some fish may never work, I had a paratilapia polleni(similar to bleekeri) that would hang with the SA/CAs. Except once it decided to lip lock with a RD it had it's lower lip nearly ripped completely off.
Water params can go south quite quickly with heavily stocked tanks, personally I like more water changes then less. Do lots of testing and get to know the chemistry of your water and how it reacts to different scenarios.
Good luck, don't be angry with all that oppose you. They may just have differing beliefs or lack experience in the matter.
overstocking chiclids ONLY WORKS WITH AFRICANS. Don't tell people crap information.
Lack of knowledge, experience leads to crap information.