I had 3 angels in a tank with tetras and other small fish. They were fine untill one day 2 of them decided to pair up and try breeding. They killed most of the other small fish in the tank that were too slow when that happened.
they won't if they are big enough... you can try black neon's, and lemon tetras, monk tetras, or cardinal tetras... these are the commmon names that I know them by you should also try (tanichthys Albonubes) the new white cloud...
well, i had fifteen cardinals in my planted tank with my two angels.... am down to three... have yet to find a carcass... so, am thinking the larger angel has been "busy"... just my experience...