Here's how each AFC contender has done against other AFC contenders:
Chiefs: 1 W (at LAC), 3 L (vs LAC, vs Buf, at Ten)
Titans: 4 W (vs Ind, vs Buf, vs KC, at Ind), 1 L (at NE)
Bills: 2 W (at KC, at NE), 2 L (vs Ind, vs NE)
Bengals: 0 W, 1 L (at LAC)
Colts: 2 W (at Buf, vs NE), 2 L (at Ten, vs Ten)
Patriots: 3 W (at LAC, vs Ten, at Buf), 2 L (at Ind, vs Buf)
Chargers: 2 W (at KC, at Cin), 2 L (vs NE, vs KC)
So Tennessee has done the best against this group, but the Patriots have fared quite well (3-2) against the best teams in the AFC. It's very easy to look at the immediate situation of two straight losses to contenders, but the Pats have the second best record in the conference against the top tier teams.