I decided to go with a single male in a planted tank so he has stuff to keep him entertained. I watched them at the shop for ages and picked out the most docile one that was hanging out by himself. There was another male that was hanging around with the group of females which I thought might have been less happy alone. My guy seems good by himself, but I try to keep his food varied including some live food, and move his tank around a bit if he starts to seem bored. He loves exploring whenever I change things up.