Must make playoffs! Flex Anderson, Gio, or Moore?

I’m currently 4-5 and have made a comeback in my league due to some good trades and roster management. I now need help deciding who to flex footclan.

Standard scoring format, do I flex Anderson, Gio, Moore, or Landry? My current lineup is:
QB: Mayfield (Subject to change)
RB: Gibson
RB: Jacobs
WR: Robinson
WR: Woods
TE: Hooper
Flex: Gio, Anderson, or Moore
DST: Ravens
K: Sanders