The "One-Above-All"
While there are numerous beings that are referred to as "gods" or have claimed divinity, the mysterious entity known as the One-Above-All has been considered to be the creator god of the Marvel Multiverse. He is also the enigmatic master of the immensely powerful Living Tribunal, the judge of all realities and omniverse. The One-Above-All has been mentioned in a Guardians of the Galaxy storyline to be possibly the most powerful being in the entirety of the Marvel Multiverse.
Read more about this topic: Gods (Marvel Comics)