#3 Eddie Guerrero

Wouldn't have this been a special match for The Undertaker? Eddie Guerrero and The Undertaker have shared a ring, but it was in a Fatal-4-Way match also involving then-WWE Champion JBL, and Booker T. Since JBL was having the run of his career, WWE felt that it would be best for his momentum to carry forward to the next year.
It was the final PPV of the year and Eddie Guerrero was a few months removed from his WWE Championship reign. While many considered it memorable, Guerrero took a look at the declining ratings while he was Champion and took it personally, requesting Vince McMahon to take the title off him.
Breaking Vince Russo and Jim Cornette update HERE.
They used the opportunity to establish a main eventer in JBL, who would go on to put over John Cena in the latter's first of 16 World championship wins at WrestleMania 21. Guerrero was indirectly a catalyst for Cena's rise, though we don't doubt that it would have happened anyway.
Eddie Guerrero vs The Undertaker would have been a match for the ages, especially if you consider the quality of talent and matches on SmackDown at the time. The two were having great runs.