From personal experience, I would recommend against adding the Opercularis. In my case, I added a small Neopercularis to a tank full of wrasses and a Candy Basslet. He was the last fish added to an established group of peaceful fish. It didn't take long for the Hogfish to start harassing the other fish, including the Candy Basslet. I tried to put him back in an acclimation box for a few days to see if it made any difference. In my case, it did not, so the Hogfish went to a friend's tank.
They are very beautiful, IMO, but they are not peaceful.