Apisto's in a 55g

[Bhack91]

So I am restocking my 55g, and while Im waiting for it to recycle I had the idea to do apistos (not sudden always wanted to do this, just never had the opportunity). My question is how many different harems of apistos could I safetly stock in this tank. Im looking at a few different species including: panda, cockatoo, borellii, and agassiz. I will be keeping them with a small school of peppered corys, lemon tetras, hatchetfish, farlowella twig catfish, and a rhino pleco. Im also considering keeping my single keyhole in this tank, bamboo shrimp, rams, ottos, and celebes rainbowfish. I know I can't keep all these fish in the same tank, so I just threw them in to see what other people's opinions on compability with them are, so I can narrow down the stocklist.