I've never really found Ozzy that entertaining tbh but the others I agree they were entertaining to different extents. Coach I kinda like for his lulz factor but he was *****d out so much in his original season (and had a LOT of screentime the other two but nothing compared to his original). With Russell, I may have been able to tolerate him more if he wasn't literally the main focus in every episode he's in and it wasn't the same **** over and over. Rob pretty much made his own winning season boring but otherwise he's consistent.
As for the whole women thing the only person I can think of that they'd invite back at this point would be Jane
and I could see them giving Parvati a 4peat.