Galactus is one of the most powerful cosmic creatures in the entire comic-book universe. He is sometimes known as “Devourer of Worlds”. He was born out of the destruction of a previous universe, there aren’t many who can stop him, let alone beat him. In fact, Stan Lee also said that Galactus is certainly the most powerful character in the Marvel universe. Here’s a list of characters who can beat him:
In the Avengers: Infinity War, he would assemble the infinity gauntlet embedded with infinity stones which would make him one of the most powerful creature (like a God) in the entire MCU. In the “Infinity Gauntlet” comic-book event, Thanos denied Galactus (the World-eater) to consume a planet which crumbled due to the Mad Titan’s rage.
He is the God of Gods who has accumulated insane powers that Superman can only dream of. Well, to put things in perspective, he is more powerful than Odin or Zeus. He can fly, teleport, emit energy blasts with his bare hands or eyes. He can cause massive shockwaves just by walking. Still, think Galactus is unbeatable?
It is a powerful multi-dimensional creature that consumes entire realities, while Galactus consumes entire planets. The Hunger was able to enter Earth-616 dimension and consumed Galactus vessel, a feat nobody could ever replicate.
He is the son of Reed (Mister Fantastic) and Susan Richards (Invisible Woman). He can warp reality at his will. He could repair dying stars. He killed a celestial with a punch and restored Galactus. He made him his herald to do his bidding.
She merged with Phoenix force, could hold entire timelines in her hands and destroyed Apocalypse. She would give a tough fight to Galactus and may even beat him in the end.
He has more power than all reality. He could erase death, destroyed celestials, destroy multi-verse and galaxies.