#2 Best - Defending the Championship against every SmackDown superstar possible
If we look at the list of superstars against whom AJ Styles defended his WWE Championship on pay-per-views, it consists of;
#1 Jinder Mahal (Clash of Champions)
A female WWE star said her life is in danger. Details HERE
#2 Kevin Owens and Sami Zayn (Royal Rumble)
#3 John Cena, Sami Zayn, Kevin Owens, Dolph Ziggler, and Baron Corbin (Fastlane)
#4 Shinsuke Nakamura (WrestleMania, Greatest Royal Rumble, Backlash, Money in the Bank)
#5 Rusev (Extreme Rules)
#6 Samoa Joe (SummerSlam, Hell in a Cell, WWE Super Show-Down, and Crown Jewel)
To be precise, AJ Styles has defended the WWE title against 9 different superstars on 12 WWE pay-per-views, and in stipulations like handicap match, no DQ match, and Last Man Standing Match, which truly shows AJ's ever readiness to work a match, and why he is the MVP of WWE. But amidst all of these title defenses, there was a worst as well..