Ok, now I'm really in a dilemma!
Ok, here are my options for my centerpiece fish
One angelfish
2 female bettas
One dwarf gourami
Can I mix An angelfish with female bettas, or just stick with one type of fish
Help!
Angels. I wouldn't call mine aggressive but they do assert their place in the tank. Everybody else in that tank knows who's boss. I haven't seen a ton of aggression but I have seen some aggression from her as I introduce new fish which lasts the first day, and that's
it, then she's done. She lets them know she's queen of the tank, she gets treated as such, and no other problems. I do have an angel in a 30 gallon and would say one is possible in a 29. Just one. We have a plan to upgrade to a bigger tank so feel alright with the stock we have.
I would not be able to comment on an angel with a betta but I'd gather it's like many of these types of "centrepiece" fish in that they all have very individual temperaments. You have the two tanks so can experiment a bit here in that you always have an alternate plan if needed (just be careful not to stress everybody out with too much experimentation.). I have my angel with dwarf gourami and kribensis and haven't had any problems. In fact my gouramis swim along side the angel and seem very comfortable. My gourami are two males of different dwarf variety and they are best friends. The kribs, a pair, stay close to the bottom and they are the ones I really have to watch as they can be quite territorial and aggressive at times.
In my experience, and this is just mine, the live bearers seem to do fine with the betta (so far-it's only been a day!), angels, and gourami. That is just my experience though. We have had, alternately, mollies and platies in with these types of fish at various times.
Keep in mind that this is just our experience and that fish will respond differently to enviro, tank mates, etc.