Without the Infinity Gauntlet, Thanos stands little chance against Prime Odin. Odin is stated to be able to shatter the Earth. And he turned Frigga into stars. He has devastated while worlds, laid waste to kingdoms and destroyed demons and monsters.
Odin in the MCU's universe is stronger than Thanos. He defeated, or could defeat, many, many enemies who could possibly defeat Thanos. Like Surtur. Pre-Awakened Thor was weaker than Odin.
Thanos Feared an Attack From Odin and He Might Have Been Planning One. However, it's possible that Odin kept his kids in the dark because he was preparing to take on Thanos all along.
Once Odin was finally made aware of Infinity's true nature, he was able to easily defeat Infinity who then dwindled away to nothingness as Odin regained his full power.
GALACTUS vs Saitama (One Punch Man) EPIC Battle Crossover!
Could Odin beat Zeus?
So while Zeus' best feat is defeating a mountain-sized monster, Odin's best feat is defeating a monster as big as nine worlds. Odin outclasses Zeus in intelligence, versatility, strength, and weapons. Zeus simply can't compete. The winner is Odin, All-Father of the Æsir.
As Skyfather of Olympus, Zeus wields power comparable to Odin, whose wrath Thanos has withstood but not bested. At the same time, Zeus cannot truly die. While the most powerful of Olympians can be badly wounded or even dismembered, he can never actually pass on into oblivion.
If he was relatively calm Odin would probably engage the Hulk physically to underline the difference in power between them. Odin would crush hulk! Odin is the most powerful being in the nine realms outside of cosmic entities.
Odin stands a good chance at defeating a moderately-fed Galactus. Odin has been stated to be equal to a moderately-fed Galactus. Though Galan did withstand a powerful headbutt from Odin. The Devourer had just consumed one planet before that.
A significant part of Thor's trauma stems from his failure to kill Thanos in Avengers: Infinity War, leading to the Mad Titan's devastating Snap. Thor had Thanos comfortably beaten, yet did not strike a blow at his head, instead curiously deciding to sink Stormbreaker into the great Titan's chest.
With Odin still ruling Asgard, Thanos would have easily been stopped had he made a play for the Infinity Gauntlet. Odin himself had once sought the Infinity Gauntlet, and would therefore be attuned to any other individuals attempting to follow in his footsteps.
He transported Thor back to Asgard where Odin took this as an act of war and fought an extremely destructive battle with Thanos. Even upon learning the truth, Odin did not thank Thanos for his reluctant altruism, but told him to leave and never return.
Without the Infinity Gauntlet, Thanos stands little chance against Prime Odin. Odin is stated to be able to shatter the Earth. And he turned Frigga into stars. He has devastated while worlds, laid waste to kingdoms and destroyed demons and monsters.
In the end, Deadpool wasn't worthy. While he seemingly had control of Mjolnir and the strength of Thor, it was all a mirage put on by Loki to distract Thor.
Unlike the others, Zeus is not worthy to lift Mjolnir, but through a loophole, he can anyway. If Mjolnir is to enter his domain, Zeus's MCU powers should override Odin's enchantment, meaning he can hold Mjolnir.
The simple answer is no. Yes, Hulk absolutely smashes Thor to the ground with Mjolnir, but, he's holding both Thor and the hammer. Hulk wouldn't have been able to lift Mjolnir by himself, but since the God of Thunder had a firm grip on it as well, he was able to use it as a weapon against his teammate.
He pulls energy from the sun itself, and he can manipulate molecules in a way that can alter reality itself. Of course, he doesn't have the same level of control over his powers as Captain Marvel does, so if they go head-to-head, he only beats her when he's in control and focused.
Unable to kill his own daughter, Odin defeated Hela and imprisoned her using his own power to keep her at bay in another realm for eons. During this respite, Hela attempted to escape imprisonment in Hel and was near successful.
In a fistfight, Hercules. In a fight with weapons, Hercules. In a contest of cunning it's hard to say. Mythological Loki got himself in trouble more than he got himself out of it, and hercules has enough brains to solve several of his labors.
Although he has been sent back to the underworld time and time again, Ares is never truly killed and can ultimately never be defeated. Thanos may be quicker than the Greek God, but he is in no way as powerful.
Hercules. Hercules possesses the greatest strength of all the Olympians and is stronger than even his father, Zeus. His strength exceeds that of most other powerful Marvel Comics icons, which he proved when he took away Mjölnir from a Thor clone in Civil War, one of the best Marvel Comics events.
