I have Angels in with my Discus, I've noticed that the Angels can be more aggressive towards my Discus when i don't feed them heavily. More food less problems, but all fish and tanks are different. I would say get the Discus setup and happy and then introduce Angels. Experiment, if things look to be going south make sure your willing to move the angels to another location. As far as what types i recommend, I'm in love with White-Face Red Melon and any version of the pigeon bloods.