Originally posted by Astner
It's not really that easy to compare deities and demigods from Dungeons & Dragons to to the various rankings used to categorize comic characters. Partially because the deities and demigods powers are immortal and their powers magic-based, so certain Herald-class characters have no means of fighting them to begin with.
But a good basis for comparison would be

emigods ~ MetahumansLesser Gods ~ HeraldsIntermediate Gods ~ TranscendentsGreater Gods ~ SkyfathersOverpowers ~ Abstracts
They can still die and have been killed. Also 4e had stats for some Gods, 5e has Tiamats stats too. Except of this Herald went up against seemingly immortal beings. But overall I agree, it's hard to compare.

Nice list.
Are you playing D&D btw?
Overpowers like Ao are even harder to compare. Some like Chaos would be abstracts, while some like Ao would be more like Mephisto level or Dormammu in their real and far weaker outside.
Where would you place the Lady of Pain, in Sigil and outside? In Pages of Pain it is hinted that she is the daughter of Poseidon and Akadi.
And where would you place Asmodeus?
There should be a Tier List with non comic chars.