1. Georges St. Pierre
Isaac Brekken/AP/Press Association ImagesLet's face it: there was only going to be one man to sit atop this list, and it's the same man who sat atop the welterweight throne for nearly six years before he vacated the title late last year. Arguably only two other gladiators who've ever graced the sport (Jon Jones and Anderson Silva) have been as naturally gifted as GSP. The man is a freak of nature, an athletic wonder who maintains a conditioning and training regimen head and shoulders above most of his peers. His work ethic is second to none and he's a beast inside the cage. Unfortunately that beast is content to play with its food rather than devour it, and that's the aspect of GSP's career that soured many fans on him. To witness someone so supremely talented fail to put away his foe time and time again was frustrating for us. This isn't some middle of the road guy we're talking about, it's the greatest welterweight in history. He had all the tools, it just felt like he refused to use them. Take the fight with Dan Hardy for example. GSP had "The Outlaw" in a deep armbar, but when Hardy didn't tap, rather than crank on a little more torque and potentially snap it, the champ relinquished the hold and changed positions. And his history has several of these nice guy moments. Once he forcefully exorcised the ghost of the Matt Serra fluke, his entire nine fight title reign was marred with decisions, except a TKO victory over BJ Penn where he was brought to tears and quit between rounds. The first few weren't such a big deal, but once the excuses started up it was hard to support the popular Canadian. "This was my toughest test, I tried my best and I will be even better in my next fight." And then we got a repeat of the previous outing. Georges St. Pierre is a legend, a future Hall of Famer, an amazing guy and one of the greatest MMA fighter to ever step into combat. But when it comes to putting on thrilling fights, we're not impressed with his performance.