Kupp is ver important to the team but I wouldn't say he's close to 4th most important.

I think both Woods and Cooks are more important and that's just at the WR position.

Woods is probably their most efficient WR right now and they don't have a guy to replace Cooks' skillset and role in the offense.

I'd argue that the following players are more important:

Whit, Saffold, Cooks, Woods, Talib