We have three players - EJ, Nick Richards, and Nate Sestina - who are going to have to carry the entire burden of frontcourt minutes this season.
Looking outside the box, Corey Evans of Rivals suggests that Kahlil Whitney could play some power forward if (when) we need him to. At 6-foot-6 and probably close to 205 at this point, he would be undersized, but given that foul trouble is inevitable it is likely a position he will have to play this winter.