I think the Jazz should probably go big with their pick. However, if they're drafting outside the top 15 and Robert Williams is off the board, I think they should take a serious look at Issac Bonga. He's probably going to measure 6'10" this spring with a 7' wing-span. He handles, passes, can run pick-and-roll, can rebound and go, can finish at the rim, and can really run the floor. He just needs to add strength, fix his jumper and acclimate to playing as a forward. He should end up 6'10" and 225 lbs when it's said and done, and could be the Dante Exum of forwards.
The Jazz would eventually have a line-up with Mitchell, Rubio/Exum, Ingles, Bonga and Gobert, where everyone outside of Rudy can initiate offense and score at three levels. The ball would really move, and the Jazz would have mismatches at 2 or 3 positions every night. They'd also have plenty of length on defense.
I'd put in a vote for Jared Vanderbilt, but he's not showing that the can score, and he doesn't really get above the rim. I doubt Vanderbilt comes out this year. If he does, he might resemble Jerian Grant (OKC) in the near term, a guy who defends, rebounds and gets a few putbacks.
If the Jazz don't go big, there are a half dozen wings they can look at, and you guys have been mentioning them all, but then we're talking about a rookie playing behind Ingles, Crowder and O'Neale for the next two years, while we've still got a gaping hole next to Gobert in the front court.