PPR. Pick my RB/Flex!

I need 1 RB and 1 Flex.

Cooks vs DET
Ware vs OAK
Ekeler vs PIT

I would go with Ware since he has a way better matchup than Ekeler. Also I think Ekeler will lose work to Justin Jackson

So ware as the RB, who would you play in the flex? Cooks or Ekeler?