I haven't watched a lot of afc games in my life or even non division teams, so my list is gonna look more like a nfc central/north list than a true best of the best.
1. Reggie White
2. Tom Brady
3. Aaron Rodgers
4. Barry Sanders
5. Randy Moss
6. Adrian Peterson
7. Brett Favre
8. Jerry Rice
9. Charles Woodson
10. Larry Allen
4 packers
2 vikings
1 Patriot
1 Lion
1 49er
1 cowboy
A lot of that is me not watching enough football, but off the top, those are the best players I've watched enough to make an informed opinion