Fultz is best player in the draft, but he's also a PG, so what would Celtics do with IT? I'm not sure he and IT could coexist, especially with how bad IT is on the defensive end. I've seen Fultz play a lot (he's from Maryland area) but I think best option may be for Celtics to trade the pick for one of these big name players rumored to be available such as Jimmy Butler or Paul George.
I honestly don't see Gordon leaving Utah, he's happy there and Jazz are prepared to offer him a ridiculous contract that Celtics cant match.