Those names are only if you take it to the extreme. There are a handful of solid names that have multiple years of college experience and will be over 21 during next season:
Obi Toppin
Tyrese Haliburton
Aaron Nesmith
Seddiq Bey
Jalen Smith
Devin Vassell (under 21 but will be 20 before season starts)
Well, James Jones took it to the extreme last year...
That being said, your list is full of "Do Draft" players on my list, with the exception of Saddiq Bey who is not on the "Do Draft" or "Don't Draft" list for me (which means I could be talked into him).