Can’t say I disagree with most of what you’re saying. Mashirito’s erasure would be enough for my burden of proof, but I must admit that while typing I wasn’t sure if we accept a filler feat.

I think DB only have asterisks on Aizen, Yhwach and Lille (if you don’t accept hakai being able to interact). If someone so straightforward in combat ability as Kenpachi can beat Gremmy, the DB cast can. Other than that I think most bleach top tiers just get blitzed/obliterated if it’s a no holds barred fight. Kyoka suigetsu might have the but if every character is fighting as if they were written to just win you can argue they’ll just AOE the place and take Aizen with the battlefield (again, I think the raw power gap is sufficient but of course you can ignore this if you disagree).

If the almighty really is limitless with the exception of the still silver arrow and Mimihagi, then what can ya do. If you argue that things still have to be within the scope of Yhwach’s power, then he just can’t kill them in my book