Do NOT just "get a pair of angels" as you first must get at least four and let them choose each other and pair up, then its up to you whether you want to take the others out. But if you don't then its highly probable the pair will make the other angels miserable during breeding time as their aggression will rise.
Again, unless you know its a male and female and they're a breeding pair then never ever get just two. Either get one or at least four of them.
You could go with malawi cichlids or a community tank....ever thought about livebearers?