Make sure you have absolutely 0
ammonia and nitrites, and that the parameters are what Angelfish require. They are stressed easily and let you know right away.
The fact they are beggining to come out to eat is comforting, but make sure about ammonia/nitrites specially before you add any more fish and compromise your cycle. If anything's doubtful, refrain from adding fish for a while. Also, dont overfeed if they are not eating. Better to leave them underfed a day or two rather than letting food rot.
When your Angelfish are calmy curiositing around your tank and eating like pigs... you're good.