#1 The Undertaker
The Undertaker destroyed Rob Van Dam at Vengeance 2001 in December of that year to win his first (and only) Hardcore Championship
He reigned as Champion for two months, in which time he defeated all comers such as Raven, Big Show and Kane as a fighting Champion.
Despite the 24/7 rule being in operation, not one superstar challenged the "American Bad Ass" utilising it, such was his fearsome reputation.
Undertaker finally dropped the title to the debut winner of Tough Enough, Maven, who incidentally had also eliminated him from the 2002 Royal Rumble on February 5, 2002, when The Rock entered the ring Rock Bottoming the Champion leading to Maven's successful pin.
Had it not been for The Rock's interference, there is no telling how long Undertaker's reign would have lasted. The most dominant Hardcore Champion in the title's history may well have been the longest reigning title holder as well.