I would consider 2 schools of Tetras that you like. I currently have Cardinals and Serpaes with my Angels in an 80 gallon Amazon set-up. You might want to consider Rummy Nose, Lemon, Neons, Glowlights, as well. There are larger Tetras like Bleeding Hearts, Black Skirts, and Red-eyes. There are lots of tetras from which to choose. Consider smaller and younger Angels so that they can reach adulthood with the Tetras. Full grown Angels have been known to eat tetras. The chances of the Angels making snacks out of your tetras are smaller when they grow up together.
I would also get some corydoras. There are lots of varieties available. You can always stick with the tried and true like Bronze, Albino, and Peppered. I like Leopards, Pandas, and Spotted corys.