TARDIS actually does not stand for Time and Relative Diet in Space.<<<< actually in the comic book the doctor makes a statement that suggest the tardis can repress the effects of far intake and make you burn it faster.
Actually green lantern protects more area in space than Jedi. And doctor who saves timelines only on earth so technically he would be after super man. But then again technically he protects the same amount as green lantern because there are infinite amounts of timelines. (if I said anything about doctor who that's incorrect it is because the show was too boring so I never bothered watching it.)