Hi again Peanuts. I just had a thought that if you don't want to use any mods, you might want to avoid Moonlight Falls, Midnight Hollow, and Bridgeport. Those worlds are filled w/vamps, weres, and witches. Otherwise, it does either take a mod to cure all of them, or you would have to research the potent cure potion (I believe alchemy) to cure each one individually. That would be very hard to do. Island Paradise has 1 ghost family and mermaids.