i have a 420g reef and i'm looking for a trigger i have a small niger and i'm looking for somthing that's coral safe and large fish safe i don't have any inverts i was looking at a queen any tips also no Xanthichthys
First, I wouldn't classify nigers as mean. There's a HUGE spectrum of personality in nigers; wider than any other trigger, IME. I've seen some basically obliterate tanks, and others get chased around by firefish. On average, they're towards the lower end of trigger aggression.
So, that said, yes, on average, Rhinecanthus triggers are more aggressive. They're definitely more prone to taking out cleanup crew, corals, and such.
Don't overlook the Sufflamen genus. They would in fact meet your requirements. They are coral safe (maybe not frag safe, no trigger is), and they are large fish safe. They have the typical trigger look, with more of a Niger personality. Some of them, like the Blue Throat (not the Xanthicthys Blue Jaw) are great looking fish.
I have had a pair of blue throats in a reef for over 2 years and neither has touched a coral, fish or shrimp or crabs. They are model fish and great to look at with wonderful personalities. THey are very shy at first, most hide for up to a week.