Can I add this to a FOWLR tank?

[Delphinus]

Welcome to Canreef!

My guess is it would probably be OK. If the Tomini is smaller maybe he should be added earlier than the others so he can establish himself first, since it's always newcomers who have to defend themselves so adding him last could be a mistake.

I don't know anything about the personalities of puffers and moon wrasses so can't offer any useful opinion on those, but otherwise the stocking list looks OK to me. Those are nice choices for triggers. There are some that have reputations for being very mean/aggressive but those 3 in particular are usually not bad at all. And you're correct about the seahare, I don't think anyone you listed would be interested in pestering the seahare.