#4 The Shield
The brainchild of no less than CM Punk, the Shield was designed to get over three wrestlers when they came onto the main roster from NXT. Roman Reigns would replace Kassius Ohno before the team actually made it onto television, and Punk's original idea of a paramilitary faction was altered to a violent vigilante group, but they still owe Punk a debt for their success.
With the charismatic Dean Ambrose, technical wizard Seth Rollins, and the massive muscle of Roman Reigns, the Shield ran roughshod over the WWE, delivering their famous triple powerbomb on the unlucky wrestlers who didn't escape the ring in time.
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Though they began as heels, the Shield would turn babyface. The faction broke up when Seth Rollins turned on his allies, but they have recently re-formed and seem poised to make another legendary run.
Here's the Shield facing Evolution.