Broncos and Steelers definitely could, both good Ds and great QBs that can take advantage of the Pats secondary. Texans despite last night could maybe catch them on an off day in a game played in Houston. Ravens did beat them earlier this year even though it feels as if a lot has changed since.
The Pats are very good. But they've also looked very good in the past late in the season only to fall on their faces in the playoffs, best example being beating us 45-3 late in the season, cruising to the 1 seed, then getting handled by us in Foxboro in the divisional round.