Hmmmmmm, not sure any of them are classified as "hardy". Coral beauty and flame do ok, and I think flames are on sale on this board. You know the usual rhetoric of course that you need an established tank with lots of live rock.
I have a coral beauty in a 55 that has 100 lbs of LR and it is doing fine. I stuck him in after the tank was a year old, which is what I consider mature. Some will take 6 months as mature.