Yeah I don't know what shoes he's wearing but he stands next to kids I know who are 5'11" and he's definitely shorter than them. That said, the list of kids who've been as dominant as Wigness at AJCs in the past is pretty good company.
Adel and McDowell-White the only two prospects for the next couple of years. Too hard to guess after that. But Cooks, Landale, Acuil, Moneke, guys like that are too old to get drafted. They'd need a couple of years to work their way into a good Euro system, then a couple of years of dominance at the top of Euroleague before the NBA might show any interest.
It's easy to overlook how hard it is to make it to the NBA as an older player. Quinn Cook won a national title at Duke in 2015 and was G League MVP and is only just now signing his first real NBA contract. With the exception of Landale, none of the older college guys have resumes anywhere close to as good as Cook's.