I have a 125g reef tank. It's about 9 months old and so far happily stocked with the following:
1 Yellow Tang
1 Sailfin Tang
1 Naso Tang
Mated pair of Blue Jaw Triggers
1 Niger Trigger (He may be gone soon)
1 Sand sifting goby
1 Lawnmower blenny
Mated pair of clowns
1 6-line wrasse
2 Brain corals
2 Torch corals
1 Hammer coral
1 Bird's nest coral
2 Monipora
1 Yellow leather
1 Daisy coral
30g sump full of macro algae, skimmer & about 130lbs of LR from Sal.
So far, everyone gets along. The Niger Trigger is nuts -- but my wife really likes him -- so unless he gets out of control -- he'll stay.
I did learn that having an odd number of Surgeonfish is best -- after adding the Naso Tang -- the posturing seemed to settled down.
Hope this helps.
-geno