I'd take Eric Gordon, a future 2020 first and two future (2018/19) secound round picks.
Gordon is a good shooter who fits in with Ntilikina and Baker, both sharing the backcourt with them, and coming off the bench. He fits Hornachek's secondary break, quick firing early offense. He ran similar things in Houston. With Paul coming to Houston, they don't need Gordon as much. The two drafts picks are the key.
With Gordon, Lee, Thomas we would have three stand out shooters from 3 point are around KP/Ntilikina.
We could use this rotation going a bit smaller but faster with Lee at 3, Gordon at 2 and Ntilikina at 1.
Hernangomez/O'Quinn/Noah
Porzingis/Kuzminskas
Thomas/Lee
Gordon/Dotson
Ntilikina/Baker
That rotation will score the ball, be fun to watch and also use our 3 main assets - KP, Willy and Ntilikina in one lineup with GREAT floor spacing around them because KP, Lee, Gordon and Nti can all shoot from outside.