I also had my tang in first. I added a foxface, a flameangel, and a fairy wrasse. They all get along very well....now.....
Tangs get very teritorial. I think you'll be ok but be prepared for a little breakin period with each new fish. The tang was paticularly annoyed with the foxface when we first added him, I think it's because they look kindoff similar.
Try rearanging some of the rockwork, that seems to work a little.
Also, I have learned to pretty much add the tang last in a more community oriented tank.