I'd probably go for WM 17, Angle V Benoit, Taker v Trips, Jericho v Regal, Shane v Vince (with Shane's Coast to Coast)
With matches also including Eddie, Kane, Raven, Big Show, Taz, The Acolytes, Right to Censor, Chyna and Ivory.
Then to top it off the TLC between Hardys, Dudleys and Edge & Christian and finally Stone Cold v The Rock with Austin's heel turn. Which would also lead to the Two Man Power Trip, with Austin and HHH.
The talent appearing on this PPV was probably the most stacked WWE ever was or ever will be.