Mollies are sold as freshwater but they are not, they are brackish fish and will die within a week or two.
setup #1- a bunch of discus, a couple ghost catfish, a peacock/tire track/zig zag eel, some silver dollars, a pleco, some flag fish, and maybe a few tinfoil barbs.
Setup#2-a bunch of guppies, a bunch of neon tetras, a pair of kissing gourami, a pleco, some mixed color platies, a few rainbows, and again some silver dollars.
Setup #3-2 auratus cichlids (only get the auratus cichlids if the tank is 40g or over), 5 longfin skirt tetras, some neon swordtail fish, 3 angelfish, a alpine gourami, and a neon gourami.
Setup #4-3 albino convicts, 2 convicts, 2 auratus cichlids, 4 peacock cichlids (types of your choice!), 4 yellow lab cichlids, 3 silver dollars, 1 brown knife fish, and a dino bichir.