None of my tangs [Yellow, Purple, Sailfin, Hippo, Powder Blue] pick on any of the other fish. Which consist of: Snowflake clownfish, Benggai Cardinal, Mystery Wrasse, 4 line wrasse, possum wrasse, Majestic Angelfish, Flame Angelfish, Niger Trigger, Royal Gramma.
Remember, this is a hobby is meant to be fun and uplifting, not stressful. Just be cautious. Learn as much as you can. And I'm sure you will enjoy your beautiful tangs. GL brother.
A school of yellow tangs is always a good thing.
One of my favorite things to see in a tank. It's one hell of a visual.
How long have they been together... are the Tangs still relatively young? I've been reading a lot and it seems as they get older they will become more aggressive. How often do you feed seaweed? That seems to keep aggression down as well. How big is your tank too?
On another note... does your Niger Trigger pick on anyone? I've heard they're nasty!