From 2006-2016 Denver's record has looked a lot like the Bills' +1 win, outside of the 4 years of Peyton Manning. 9-7, 7-9, 8-8, 8-8, 4-12, 8-8, 9-7 in years without Manning.
Ravens stalling has been a more recent occurrance, so not as much of a trend, but 8-8, 5-11, 10-6, 8-8 in the past 4 years doesn't scream 'always in it' to me.
I added Seattle because since 2012 they've made the playoffs every year and have gone 11-5, 13-3, 12-4, 10-6, 10-5-1.