Too bad your so far away.
I currently house a 13" vlamingi, 12" male Naso, 10" female Naso and a 9" sail fin tang in my 400 G tank. They have all grown up with each other and are doing great. Even though I have a large tank, I want to get rid of the Vlamingi and sailfin as I'm slowly turning the tank into a full blown reef and don't think there will be enough room for them all to swim around.
They do however swim with each other now. It's just that I also have a 8" pink tale trigger and a 7" rabbit fish in the tank as well. I want to also get rid of the rabbit as to keep my population of LARGE fish down to just the three.
I also have wrases, royal grama's, anthia's, mandrins' in the tank and the larger fish do not bother them.
If your going with large fish, I'd try and keep it to about 3 or 4 show size if you also want to keep corals in there.