#3 CM Punk
For only having appeared in six Royal Rumbles, CM Punk's numbers are pretty remarkable.
Punk lasted a total of 2 hours, 39 minutes, and 6 seconds, never once going under 10 minutes. His worst time was ten minutes and three seconds in 2010, but that was also the year he delivered his famous "Sermon on the Mount," where he boasted that he would be the first straightedge Royal Rumble winner. He eliminated five people that year and spent almost the entire first third of the match as the only person in the ring.
His performances in his other five Rumbles weren't too bad either. He holds the distinction of being the only person on this list to have eliminated at least one person in every single Royal Rumble he entered. Punk managed to throw out a grand total of 18 competitors in his six appearances, giving him an average of 3 eliminations per Rumble. This means that, on average, CM Punk eliminated a tenth of the field in every Royal Rumble he entered.
His last two Royal Rumble appearances proved the most fruitful for his numbers. In 2011, he went 35:11 and eliminated 7 men (more than anyone else that year) alongside his Nexus brethren. As of this writing, he is one of only 16 men to have eliminated 7 or more people in a single Rumble. Finally, in 2014, Punk entered at #1 and made it all the way until the Final Four, going an astonishing 49 minutes and 11 seconds, the 17th longest of all time. This also makes him one of 13 men to have entered at #1 or #2 and lasted until #30, as well as one of just 11 men to have made it to the Final Four from said position.
Maybe he was right when he called himself "The Best in the World"...