Just because they are the same size doesn't mean they will live together, you may get by for awhile, but eventually that 1 texas you still have will need to go. And choosing to go with an african cichlid tank is a good idea, but it comes with it's own learning process. I'm not too familiar with africans, but they don't all get along either. There's a whole sub forum on african cichlids on here that you can learn a lot from. There are members on here very knowledgable about african cichlids, and maybe the topic belongs in a thread of its own.
But I believe you can mix most peacocks together, some haps can be with peacocks, but not all. Mbunas I believe are trickier and keepers usually choose a species or 2 to have colonies of, not a mixed tank with 1 each of several types like you mentioned wanting to collect. But some are peaceful enough to mix with peacocks, like yellow labs. I have very little experience or knowledge on africans though.
My advice is ask on here first, then buy the fish. I've been there myself and read countless other threads on here where you see a fish you just have to get only to buy it, get home, and then ask about it and learn it is completely unsuitable for the fish you already have. You can save yourself several return trips to the store, and getting half credit on returns if that, and stress or death to many fish if you ask first, get a plan, then go to the store with a plan. They might not have everything you want on hand, and maybe you can order some, or just wait it out until some are available. But if you have an idea of what will work then maybe you'll find something similar in the same family or category etc.
But I believe you can mix most peacocks together, some haps can be with peacocks, but not all. Mbunas I believe are trickier and keepers usually choose a species or 2 to have colonies of, not a mixed tank with 1 each of several types like you mentioned wanting to collect. But some are peaceful enough to mix with peacocks, like yellow labs. I have very little experience or knowledge on africans though.
My advice is ask on here first, then buy the fish. I've been there myself and read countless other threads on here where you see a fish you just have to get only to buy it, get home, and then ask about it and learn it is completely unsuitable for the fish you already have. You can save yourself several return trips to the store, and getting half credit on returns if that, and stress or death to many fish if you ask first, get a plan, then go to the store with a plan. They might not have everything you want on hand, and maybe you can order some, or just wait it out until some are available. But if you have an idea of what will work then maybe you'll find something similar in the same family or category etc.