CoronaBlue
Aquarium Advice Freak
Well your Angels are your mid and focus of tank, if it were me I'd get 2 more Cory's to add to the ones you have. They enjoy numbers and you will get more activity from them by adding a few more. I don't have Angels, but if I did I would add a school for the top of tank. That way you have every part of the tank covered with the least amount of aggression.