Through Week 8 of the season, the NFL's toughest division is a perennial talking point. And since there is no real rubric to measure all 8 divisions, the best tool would be to look at the cumulative records.
*Note the bye week: 2 NFC East teams, 1 NFC North and South team, and 2 AFC North teams
# of wins:
- NFC East: 14
- NFC North: 13
- NFC South: 15
- NFC West: 13
- AFC East: 15
- AFC North: 15
- AFC South: 18
- AFC West: 14
Now, as a Giants fan obviously my knee-jerk answer is always the NFC East and for good reason. Typically, the NFC East has only one poor playing team a season: in the 2000s, the Washington Redskins hold that mantle. Mostly, though, division crowns are a one-team race. The AFC East, AFC South, and AFC West all belonged to the Patriots, Colts, and Chargers most of this decade because of poor competitive play. C'mon, what's the cumulative record for the Raiders and Chiefs? How 'bout the Texans and Jaguars? The AFC North? Ok fine, two teams only: Steelers and Ravens.
The NFC West is the most mediocre in the league, and the NFC South is (literally) a crapshoot every year. Only the NFC North and East have had three teams play competitively most of the 2000s, but with the Lions an annual circle win, and Chicago going through 23 starting quarterbacks since 1990--23!-- they've not played up to their great tradition, either.
And the division with the most Super Bowl trophies? Yep, the NFC East at 11. So those franchises do not tolerate losing for too long.