Saunders would be our wing players. Fouss, Waterman, and Kozlowski will play the 4/5. The biggest issue we have right now is we can't expect Fouss to play 40 minutes and we have no viable backup for him (Waterman and Kozlowski are good at the 4, but not the 5). So at a bare minimum we need another post player who can play the 5 to come in from the transfer portal.
In addition, getting another guard who can play is vital. Ideally a combo guard who can give some backup PG minutes but is also capable of time on the wing at SG as well.