I'll give you Niang and Nader's senior year, those were still under Hoibergs recruiting cycle.
I'll even give you 2016-2017 since we had 4 senior starters even though thats a terrible excuse. Prohm had plenty of time to recruit for that year and they still had plenty of bench minutes for guys coming in that year as freshman. He could have easily found some guys like Thomas/Naz who were stuck behind a bunch of seniors their freshman year, but then really developed their sophomore and junior years.
If you project out the roster for the 2020 season they will have exactly one guy again, Terrance Lewis. So in 6 years they would have had exactly 2 guys make it through as seniors, Solomon Young who is a solid player, and Terrance Lewis who hasn't done much so far. Not good as far as sustaining program success.
Most people think of Hoiberg as Transfer U, but most of his success was built on the backs of high school players, Ejim, Niang, Morris, Naz, Thomas.