CMC, Mixon, Chubb, Melvin… pick 3, bench 1 for Championship Week 16

Which of these 4 RBs should I bench for Championship Week 16? (2 RB spots + only 1 FLEX)

Christian McCaffrey, Joe Mixon, Nick Chubb, or Melvin Gordon?

1/2 point ppr league

Rushing Yards = standard 10 yards per point

3 point bonus for 100 rush yards; 5 points at 150 yards; 7 points at 200 yards

Rushing TDs = 6 points

Oufffff… bench mixon or melvin I guess. This is rough