Yes, a single Angel in that size of a tank would do well with some larger peaceful community fish. I wouldn't do Mollies, that's like keeping Bettas with Goldfish. Mollies are brackish fish, they like a little salt in their water. They can live in fresh water but they are not thriving, just surviving. You would be better with bottom dwelling fish, as Angels are Cichlids and very territorial, so a fish that's not in their space would be better. Google it though.
Tetras, Rainbow Fish, Rams, Swordtails, Danios, Rasboras, Platy, Loaches, Cory, Barbs, Kirbs are all nice fish.
Look at these....
Bolivian Rams, a Dwarf Cichlid. They go good with Angels.