The flame's been in there a couple of years. When he was added there was a coral beauty already there (I didn't know better then!
). The flame didn't appear aggressive, but the coral "mysteriously" died within a couple of days. (No witnesses...)
The next add was a blue hippo that the flame didn't seem to even notice. They still live peacefully together. A year or so after that I added a naso, the flame did not like that much, but got over it after a week or so.
I'm thinking if I add the bi-color, I'll do some rock rearranging as suggested above. If I do add him though, he's there for good as I have so much rock that I can never get anyone out (except one stupid clown that I can catch anytime I want!)