#2 The Usos vs. The New Day

It might be surprising that a little over a year ago, The Usos weren't exactly the most well-received act. Now, they have a very good case for claiming that they're the best tag team in the world. Though they were beginning to get over after their heel turn, it was the feud with The New Day throughout the summer and early fall that really catapulted them to the stratosphere.
The warm months proved dismally cold for the blue brand. I don't think it can be exaggerated just how bad SmackDown was in the months following the superstar shakeup. You had Jinder Mahal boring the place to death with his torturous WWE title run, a women's division that had no direction and which shunted its biggest stars in Becky Lynch and Charlotte Flair, and a mid-card that was a surprising dud, even though AJ Styles and Kevin Owens feuded for the United States Championship.
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There were three foreign heels on one show. There was Shinsuke Nakamura being used to his weaknesses rather than his strengths. There was John Cena, who returned for a run that was notable only for an atrociously bad flag match at the worst pay-per-view of the year against one of the said foreign heels. There was the wrong Money in the Bank winner in Baron Corbin, who subsequently failed his cash-in in the most embarrassing manner possible when WWE seemingly realized it made the wrong decision.
It was bad. It was so bad that I stopped watching the show for months, only paying attention to one thing on the blue brand, it's sole bright spot.
That sole bright spot was the feud between The Usos and The New Day, and what a bright spot it was!
Every match between the two teams was not only great, they all were among the best of the year. The two teams had the sole good part of an awful Battleground, wrestled the best pure tag team match of the year that was criminally relegated to the pre-show at SummerSlam, and had a Hell in a Cell match that was both genuinely innovative and immensely entertaining.
The tag team titles changed hands numerous times, but the hot potato game only served to make the war more intense this time, as it was an open question as to who the best tag team in WWE, if not the world, was. The Usos finally won the decisive encounter at Hell in a Cell and provided us with the answer.
It was flawless. So why does it only come away with a silver medal? Because an even more important and equally excellent feud was going on at the time that would shape the course of WWE's main event for the foreseeable future.