Help Choosing Corals

I am seeking advice for my 65 gallon tank. It has mostly live rock and I want to add some coral or other items. The problem is that I have a pencil urchin that has been very good at eating algae down to the rock (mostly coralline). Yes, I know that urchins and corals don't mix well but I was hoping for an idea or two. There is a bubble tip anemone that hasn't been bothered.

Thanks in advance.