You will have to move the black moor. As far as what you can put with the betta like it was said above it depends on the betta. I have had male and female bettas with Neons, Swordtails, Fancy Guppys, Playts, Corys, and Otos just to name the ones I can remember and have never had a problem with any of them. But a friend of mine had his betta with neons, playts, and glass fish and the betta attacked the neons. Another option for you is to get a divider and divide the tank in two and get two bettas.
Keeping fish its not a hobby it is a passion!
55 gallon, 44 gallon, one 20 gallon tank, three 10 gallon tanks, and a 2.5 gallon all with real plants
I have MTS and there is no cure.