Here's my list of people I'd be ecstatic with using the TPE on:
Harrison Barnes: 17PPG, 6RPG, 4APG, 50% FG, 41% 3P, 87% FT. Championship experience, has been a consistent 17+ on good efficiency over the last 4 years, plays solid defence. He'd be my #1 target.
Aaron Gordon: 14PPG, 7RPG, 4APG, 43% FG, 37% 3P, 61% FT. Not as consistent on offence as Barnes, but he's a better playmaker and a more dynamic athlete. Currently out hurt with a severe ankle sprain though, and won't be back until March :/
John Collins: 18PPG, 8RPG, 2APG, 56% FG, 42% 3P, 80% FT. Probably the most dynamic offensive force we could look to acquire. He's been a 20/10 guy for 3 years now, on insane efficiency. Doesn't add much defensively, but with his athletic tools and a good defensive coach maybe he could grow there.
Nikola Vucevic: 23PPG, 11RPG, 4APG, 48% FG, 43% 3P, 84% FT. Likely not who DA has in mind, given he's a true centre, but Vuce is a star and I would love him here. Not nearly as realistic as many of the others given he's arguably a top 5 offensive big in the league, but I won't stop advocating for my binkie!
Gorgui Dieng: 9PPG, 5RPG, 2APG, 55% FG, 52% 3P, 84% FT. Over the last two seasons has developed an actual perimeter jump-shot, shooting 38% on 2.4 attempts over the last two seasons. He's playing really elite defence this year too, and has improved his passing. Problem is he's a centre, and of a similar calibre to all our others.
There are others, but I don't know how much they fit the bill of shooting with size. Guys like Terrence Ross and Wayne Ellington.