#1 Frank Shamrock
The majority of fighters who fall out with Dana White tend to kiss and make up eventually, even the most bitter ones like Tito Ortiz. The fact is that more money can be made if both parties simply get along. The same cannot be said for Frank Shamrock, one of the UFC’s most legendary champions and one of the greatest MMA fighters of all time.
Retired and working as a UFC commentator when Dana took over the company in 2001, Shamrock quickly fell out with the president for reasons that remain largely foggy. Since then, however, he’s literally done everything within his power to harm the UFC; be it badmouthing Dana in every interview he does, or joining forces with every rival promotion to spring up, including Bellator, StrikeForce and Elite XC.
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He’s even issued veiled threats towards Dana in some of his interviews, triggering the UFC president to label him as mentally unstable. Shamrock’s relationship with the UFC is so bad that despite being one of their most decorated champions – the original 205lbs titleholder with an impressive four successful title defences – he’s been largely erased from UFC history. Even the likes of Ortiz and Couture haven’t been treated that badly. Shamrock is definitely one man Dana ought to avoid if he’s out and about.