Excluding Wrestlemania X-Seven which is GOAT to me, in 2000, there was a five star PPV for 12 straight months excluding Mania
but it's probably between:
Backlash 2000
Summerslam 2000
Also, Summerslam 2002, the undercard was
you had Angle/Rey, Eddie/Edge, RVD/Benoit, on top of the double main event shyt was epic