1. Micah Parsons
Parsons is the obvious first choice.
With 12.5 sacks in his first 13 games this season, the Cowboys premier edge rusher is a nightmare for offenses to game plan against. At just 24 years old, Parsons has already been named a first-team all-pro in back-to-back seasons — and he's recorded five sacks in the past four games.
Parsons uses his rare combination of size, speed, and power to terrorize opposing quarterbacks. For visual reference, here's Parsons working against Lane Johnson, a fellow 2-time all-pro, in the Cowboys victory over the Philadelphia Eagles this past weekend.
While the Bills have enjoyed some improved offensive line play this season, particularly from their tackles Dion Dawkins and Spencer Brown, this will be their toughest test to date. When you consider that Allen is the most important player in every Bills game, protecting him against the Cowboys defensive front — and Parsons — will be an imperative part of winning this Sunday.