#1 Heidenreich
Heidenreich debuted on the WWE roster in September 2003 with a bafflingly bad gimmick wherein the near 7 footer was being controlled by an unseen entity known only as "little Johnny".
The character was soon dropped and Heidenreich disappeared from television. Supposedly, the idea was that Little Johnny would be a doll in the mould of "Chucky" that represented his repressed inner child.
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That never made it to screens and Heidenreich re-debuted in mid-2004 as a more traditional monster heel and began feuding with The Undertaker.
Heidenreich atypically began reading poetry wherein he would denigrate his opponents and fans. However, the character was most infamous for kidnapping commentator, Michael Cole and ostensibly sexually assaulting him in a restroom. There was no way back after that.
Heidenreich contested some dreadful matches with 'Taker before falling down the card and replacing the deceased Hawk in the Road Warriors tag team with Animal. That was not a success either, and Heidenreich disappeared from WWE television in January 2006.
He never returned and never will. If he is remembered, which is doubtful, Heidenreich is better best forgotten.