If the fish all turn out to be the same sex there shouldn't be any issues. Where people run into issues is a mated pair forming. That pair will terrorize the rest of the tank. Amazingly they'll be content to raise a huge spawn in a 20H until the fry get in the way of the next egg laying.
I know someone with a 450 gallon tank. She could only keep one mated pair of Angels. The dominate pair tried to kill the other pair. Three male bettas and shoals of other fish all find room. Two pair of angels couldn't.