my angels love my pearl gouramis, and vice versa just make sure that whatever you put in isnt small enough to become food for the angels, they are predators and will not appreciate the fact that you preffer your little fish alive.
Providing your tank is large enough you could add 2 silver and 2 black arowana, 4 sun cats, 4 geophagus brasiliensis, a tire track eel, a couple offei fengs and school of silver dollars.