O&C killed LT because there were no "rules" at the time. It's an unmeasurable feat.
We need more time to come to a conclusion. I'm inclined to lean towards Logos on account of easily killing all of the Celestials (who should be outside of the hierarchy and therefore usual strength, but I'm making that up). I think AM could have killed them too, but not as easily.
Originally posted by MaZeRaIII
The one that didn't get his arse kicked by Ultraman or stalemated by Superman-tier entities like Darkseid. 😄
And Darkseid isn't Superman tier in new 52. He is a bona-fide universal abstract.
Speaking of which Logos did get his ass kicked by Tiger god which is just a lowly god.