To me, RaiQuan Gray is like a grounded tank. He's what you get if you take all the jumping ability away from Zion Williamson.
What Gray can do to move at his size is truly sensational. He's got good guard and passing skills, is a load of a guy who puts his shoulder into people, and is a legitimate multi-positional defender. But he isn't a shooter from distance, and teams could choose to play him in the half-court the way they choose to with Zion: go underneath everything and stay lane protected.
I don't see that changing for Gray until he becomes a really reliable 3-point or pull-up shooter. Teams go under all screens or handoffs in exaggerated fashion. Help defenders don't collapse as much as a result., which handicaps his passing upside. There's a lot here to like, but a lot to be pessimistic about.
At 21 years old, Gray isn't the youngest guy to be considered for the second round. I think he's a second-round talent whose lack of polish is going to likely drive him closer to undrafted territory.