2007 New England Patriots
The Patriots' perfect regular season in 2007 was more than just an unblemished record, it was an across-the-board reckoning for a club that genuinely wanted to win every game 45-7, no exceptions. How else does one reconcile otherworldly production in point differential (+19.7), turnover margin (+16), wins by 10 points or more (12) and a 6-0 mark against playoff teams -- including three division champions. But alas, there's a fine line between being universally hailed as the greatest club in NFL history (on the precipice of 19-0) ... and begrudgingly accepting SI's award for Best Team To Not Win A Super Bowl (only one entry per franchise). But that's a reality of the ultimate bittersweet season.