Characters who are Gods among gods

Arceus(Pokemon)- he's the first being to exist in the universe, made the creation trio

Chaos(Hades)- a personification of primal chaos from which everything was born.

Tiamat(Smite)- begat all life in her union with Apsu

Aurelion Sol(League of Legends) made the celestial realm, lesser deities- aspects feared him and desired his knowledge and power for themselves, so they tricked him into servitude.

Bahamut(Dragalia Lost)- the Origin