I maintain that it’s probably Zamasu. Destroying or threatening to destroy stuff isn’t reliable IMO. Too inconsistent. People are consistently amazed about characters making craters or lifting small weights.
Following the hierarchy, I’d say SBV or Golden Oozaru are SSJG level, since they’re all above fusion. SSJ4 is the step above that, so it’s comparable to Initial SSJB.
The thing is, SSJ4 Goku doesn’t get any power ups (aside from Limit Breaker, which isn’t as significant as PSSJB or the power ups vs Black) while SSJB Goku does. So SSJB Goku (End of FT Saga) >> SSJ4 Goku, and thus SSJB Vegetto >> SSJ4 Gogeta, but I’d say Gogeta is still above KKx10 SSJB Goku.
Basically, when Goku and Beerus fought the impact of their punches made was shaking the whole universe and they almost destroyed the universe as collateral damage. Nerds have calculated it to mean SSJG Goku can destroy the universe many times over if he really wanted, which is more than GT ever showed.
There’s also the idea that the Afterlife is as big as the universe, so Goku would be destroying the two universes, but I don’t remember if we actually see the Afterlife shaking. Just the normal universe.
An interesting narrative element that isn't often discussed is Beerus' view of: Godly ki > normal ki.
It poses the question: is this due to the vessel carrying normal ki not being expected to have as much potential as a God (i.e. relatively speaking as opposed to a hard rule), or that normal ki maxes out at infinite 3D power and no higher dimension?
Just something to think about.
To add on this, the Moro Saga has Goku complain he can’t maintain UI because he doesn’t have enough “god power”. I think Dai Boo also says something like this about his own limited power.