It's not that it's a FOWLR tank that will narrow down what corals you can keep, it's the type of livestock and lighting you have. You probably need to research your specific butterfly and angel fish and see what corals they are known to dine on. Then try to avoid those. Of course nothing is guaranteed. Your butterflies might eat a coral that someone else's ignored and vice-versa. Also, what type of lighting are you running on the tank?