We could trade NWG or even just a 2RP to GSW and get Glenn Robinson III. He's an athletic, 6'7" switchy defender who hits 37% of his 3s. He can take Niang's 15 mins/night.
Easy.
If we could pull off one of these Richaun Holmes/Christian Wood energy bigs, that would be fine. It's too bad that Marquese Chriss is an insufferable doofus, or he'd work. Markeiff Morris can be had, though he's not exactly a sharp tack.
Detroit is tearing things down and cutting salary. They have Wood, Morris and Thon Maker all on their team. Unfortunately Maker doesn't rebound for some reason, so he's probably out.