It is damn hard for me to tell the best match, but i can do with a list of 10. Here comes the list in no specific order

Triple H vs Cactus Jack - Royal Rumble 2000

Rock vs Stone Cold - Wrestlemania 17

Rock vs Triple H - Iron Man - Judgement Day 2000

Shawn Michales vs Triple H - SummerSlam 2002

Chris Benoit vs Triple H vs Shawn Michaels - Wrestlemania 20

Brock Lesnar vs Kurt Angle - Wrestlemania 19

Kurt Angle vs Chris Benoit - Royal Rumble 2003

Edge vs Eddie Guerrero - SmackDown after Summerslam ( No DQ match )

Kurt Angle vs Shawn Michaels - Wrestlemania 21

Shawn Michaels vs Shelton Benjamin - Gold Rush Tournament