Interesting analysis. I don’t necessarily believe that Bigs must be able to shoot 3’s in my Brave New World. But they need to be athletic and consistently be able to hit an open 15’+ jump shot. For that reason I would not include Cox in with Boston & Cunane. Cox consistently makes that shot. In addition, according to Kim Mulkey, Cox was athletic enough to guard any player on the court.
As for Jordan not dominating games like Russell, Chamberlain or Jabbar. Maybe not. But that’s actually the point. If you’re going to spread the floor and shoot the 3, everyone on the team has to contribute.
In another post on this thread I indicate that Bigs will always be around but they will become more athletic with more versatile skill sets. Jabbar was more versatile than Chamberlain. Olajuwon was more versatile than Jabbar. Durant is more versatile than Olajuwon. They are all NBA champions, but in different eras.