4 John "Bradshaw" Layfield
John Bradshaw Layfield cut his teeth in the NWA territories, where he held both the North American title and the tag team championship with Bobby Duncam Jr.
When he joined WWE, JBL went through a plethora of different gimmicks. First, he was one half of the New Blackjacks along with Barry Windham. When that didn't pan out, he was bundled with Farooq as the Acolytes, enforcers for the Undertaker's Ministry of Darkness stable.
When the Ministry folded in on itself, Farooq and Bradshaw dropped their cult member gimmick and instead became the APA, a pair of mercenaries who liked beating people up almost as much as drinking beer and gambling.
Then he transitioned to the JBL character, a sort of JR Ewing homage, and fans started to hate on him. JBL was elevated to the main event and proved to be a capable heel champion, feuding with Eddie Guerrero and John Cena.
The critics who lambaste JBL do so because of his perceived lack of wrestling ability. But JBL was an underrated in-ring performer. As a big man, he had to hold back to avoid hurting his opponents for real. And his Clothesline from Hell is still one of the stiffest shots in all of wrestling.