@justanormalguy: Buu never did anything close to destroying the universe. When he was "ripping apart" the universe and Vegito stopped him, it wasn't even canon, it was an anime-only feat, never even appeared in the manga. And where did you get that interview? Link it to us. It's your burden to prove that your claims are legit because if you don't give us a specific source then we can't take that interview seriously at all. Anyone can walk into a thread, write up a fake interview and claim that it's legit without giving us a link to it.
Vegito hasn't done anything that Thanos has. Thanos has fought powerful opponents like Odin and stood his ground, enduring Odin's best attacks. Even the Silver Surfer got mopped away by Odin, yet Thanos didn't. And the Silver Surfer is a massively FTL, solar-system busting, insanely durable, insanely strong being with super-hax matter manipulation, hell he can create black holes in people's minds and has channeled the energy of the Big Crunch yet has always been manhandled by Thanos. Nobody in DBZ even comes to close to the Silver Surfer let alone Thanos.
SSJ3 Goku shook the entire planet by transforming? Yeah...the Surfer almost destroyed the entire planet once by waking up from a nightmare, that was accidental. He's collapsed entire stars with his hands. But Thanos still beats the snot out of him without even breaking a sweat. Hell Thanos even manhandled The Champion when The Champion was in possession of the Power Gem which grants him infinite physical power but he still didn't stand a chance against Thanos.