There are plenty of fish that would go. It is so difficult to think of them all
I think the best thing you can do is go and look in all your local shops and make a note of the fish that catch your eye. Don't buy any of them, if asked just say you are trying to decide.
Once you've finished looking, sit down and look up all the fish you noted on Seriously Fish. In particular, look at the hardness they need; the size of tank they need; and in the Behaviour and Compatibility section, see if there is anything about them being fin nippers. This will eliminate a lot of the fish you noted but there will be plenty left. Those are the ones to choose from.
There is nothing worse that deciding that x fish would fit perfectly and then discover that no-one sells it. I speak from experience
Don't listen to anyone in the shops if they suggest fish and try to get you to buy them. So many shop workers will say any rubbish to make a sale and will suggest the most unsuitable fish.