Assuming you are right, are Russell Wilson and Marshawn Lynch really top 20 players? Richard Sherman and Earl Thomas are top 10. I would put Wilson around 30 or 40. He is very very good but I would still take Luck, Brady, Rodgers, Brees, and Manning over him - excluding the age factor.
I like Lynch a lot but top 20? In today's NFL I probably would put only Peterson in the top 30 or 40 players. There are 7-10 QB's, 5-8 CB's, 7-10 WR's, 5-6 TE's, 8-10 OL, and 10-15 DL/LB's better and more important than any other RB in the league besides Peterson. The only other guy that is close is McCoy.