Supergirl isn't stronger, Did y'all see the last issue of Supergirl. Superman owns evil Kara. He admits that he holds back because of his upbringing.
Superman would take any GL 8/10 I base this on how easy he dealt with John Stuart when he was controlled by Max Lord, and how easy he dealt with an entire Corp lead by Hal Jordan in "Red Son" Granted that's out of continuity, but it still shows how the writers percieve his powers.
There is a GL I think could beat him 6/10, it's also elseworlds, but "Superman Last Son of Earth" got a ring for a while" The reason I just barely give him the majority is that he still isn't Kryptonian and doesn't have all the powers.
It was the other way around, Orion didn't use the full force of the Astro Force if he did it would have killed superman. Orion will kick superman ass, he did during the pre-crisis era he can do it now depending on the circumstances
gladiator and sentry are iffy one's because they are so close to supes that it's like he'd be fighting himself. meh who knows?... the writers i guess, because they ARE the guys that create the situations and the conclusions, cant argue with them in the end.
Thanos, Quasar, Silver Surfer, Gladiator, Sentry, Genis etc
NOPE, unless its post crisis, maybe gladiator but ss, quasar, thanos, SENTRY (the BIGGEST copy off of superman yet, hes solar powered and has an s on his belt!) and genis cannot.
pre crisis or prime cant be beat by any of them