in my 210 gal...i have a Purple tang with a Scopas Tang, 2 Yellow Tangs (first ones in the tank), Blue Hippo, Naso Tang, Orange Shoulder tang and the newest Achilles Tang...and out of all these my most aggressive would have to be my smallest Yellow tang, but the Purple Tang will fight mainly with the scopas and small yellow tang ( i guess it's do to the body structure).....

what i have done especially with my latest addition my Achilles Tang is that i left the bag with the fish in the sump to acclimate to water temp. but at this time the aquarium lights had been off for the night, and all fish were "asleep" (got knows what really is happening behind the rocks), i then released the fish into the tank, and kept the lights off till the next day for approx. 8-10hrs or so, and immediately the Achilles was swimming on its own little world back and forth not worrying about the other....

i have tried this method with all my fish and they seem to do pretty good.

other fish that i have in the tank with my Purple Tang.....Coral Beauty, Flame Angel, and Koran Angel, and they seem to get along good...with no problem.