I think below is achievable and would be a decent lineup - Won't compete for a B12 championship, but could still compete in the middle of conference. Still have to land a rim runner and a solid Wing player that can handle the ball and attack the hoop some with a couple more players for depth/development purposes. Depending on the quality of the new wing and the new 5, there could be more upside than I show here.
1: Hall
2: Transfer Wing (JRob equivalent) - TBD
3: Richie
4: Waterman
5: Keita - TBD
Backup Guards:
Stewart
Knell
Baker (Could Start if healthy)
Wing and ball handler - Developmental prospect from Europe or Transfer Portal - TBD
Backup Bigs:
Kozlowski
Fouss
Transfer 4/5 Developmental Prospect from Europe- TBD