I have always wanted a Queen Trigger, had two different ones years ago. One was a killer.... slowly ate my yellow tangs & the other who was close to 10in long was a complete whimp. Titan's are also suppose to be great but don't they get 2ft+ in captivity? 12-20in for a queen seems to be the norm for a queen in captivity. I like lots of fish moving & not a large tank with a single fish.
There are some good looking triggers who also get large that work great in community tanks...... Pinktails are usually on the calm side...
You could possibly add a Naso, Sohal, powder blue/brown w/o issues. Even add a few naso's since they do not have the attitude the sohals & powders have.......
Some state bluejaw, sargassum, red tail & the cheap crosshatch triggers all work in reef tanks.