It has to be Cena. Umaga, the Nexus, Wyatt, Rusev, Cesaro and Ryder, to name a few, could have easily gotten over and gotten over quite well. While I would argue that certain names there seem to be making a comeback, they certainly got a little too close to Grand Master Sexay's entrance than they, or their skillsets, were comfortable with.
Hunter, on the other hand, put down a guy who could have been the biggest star of the post-Attitude Era (in Booker T), Kane, RVD, Nash, Steiner, Goldberg, ect. Now, Booker T could have been the face of the company. But Kane? Guy used to put his hands in front of his face to take a bump on the stupid aluminium tin can thrash cans. Kane's been called the greatest of all time, and I am a mark for the guy at shows, but he was never going to be more than he is today. RVD is a little sketchier. Sure, he was the guy in ECW, and rightfully so, ECW was the perfect environment for him, but I would argue that it was Shawn Michaels returning that really buried RVD. If the first Elimination Chamber had happened six months later, history could have been different, but Michaels coming back really threw the whole thing into turmoil.
But the rest of these guys? Sting's a middle-aged man with a baldspot, for god's sake. The fact Steiner lost the WCW title to Booker in 2001 on the last Nitro showed how far he was going to go with the company, especially when he took time off because he was being paid to sit on his ass. Goldberg was never going to get fully over, I don't think. The guy wrestled so stiff he makes a match with Sheamus look like a gentle breeze on a warm summer's day. Kozlov wasn't really liked, I don't think. I never remember him, honestly. Punk held the Championship for over a year. 'Beating' isn't 'burying', honestly. Triple H needs legitimacy, too, in his current role.
But it's not fair to say Cena or Trips buried more guys. WWE creative buried more than either of them could have. Neither buried an entire roster over the course of three hours, and they certainly didn't do it week after week for nearly a year, now.