Here's a target that hasn't been talked about yet:
Larry Nance Jr.
He's a modern big that can shoot threes and switch on defense. The exact kind we've needed.
36% on threes on 5.2 per 36. Also 15% assist rate over the last three seasons, so you get some playmaking there. Versatile defensively. Has a very reasonable contract for two more years at ~11M per year.
He's also the type of player that Neil would build his entire off-season around. Like "hey, we traded Derrick Jones and a 1st for Larry Nance, we're a championship team now!"
But on a serious note, they should definitely explore a DJJ + 1st + whatever it takes deal for Larry Nance Jr. It shouldn't be the major deal, but it should be one.