#3 George St. Pierre (Welterweight Champion, 2006-07 and 2008-13), Middleweight Champion 2017)
George St. Pierre is unquestionably one of the most popular Champions, UFC has ever produced. Winning his first gold, the Welterweight Championship at UFC 65 where he overcame the long-time figurehead of the promotion, Matt Hughes.
From there, GSP's polite and unassuming demeanour won plaudits and praise from all corners of the MMA world. In a profession where trash talking and brash personalities usually put the paying customers in their seats.
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However, it was GSP's fighting skills that won him fans all over the world.
In his second run as Champion, GSP reigned as Welterweight Champion for an uninterrupted four years between 2008-13 and in that time was responsible for some enormous buyrates, most notably at UFC 94 versus BJ Penn which drew 920,000 buys and versus Nick Diaz at UFC 158 which pulled a 950,000 buyrate.
After a prolonged break from the sport, GSP's popularity had not diminished and his comeback fight versus Michael Bisping at UFC 217 drew another mammoth buyrate of 875,000 buys.
GSP is still one of the most popular stars the UFC has to offer. 14 years after his UFC debut.