As was stated, that trigger will outgrow your tank. Regarding suggestions, I would suggest you focus on stocking such that all areas of the tank are effectively exploited. That means a burrower, some bottom dwelling fish, some nook occupiers and some open water fish. With a 90, you can do a ton of small fish, but if you start stocking big guys like the trigger, you'll run out of room pronto. A 90 is ultimately a very large small tank, not a large tank, and as such, you'll do best if you stock small fish, under 6".
Do you want a peaceful reef or more feisty? Do you want slow, deliberate feeders, or fast, active, aggressive feeders? Tell us what YOU like. And we can be more help. Good luck.