Steve Rogers is one of the few mortals able to not only lift Mjolnir, but wield its full power, making him someone who legitimately could defeat Thor. Assuming the reason for their battle is due to Thor being deceived, possessed, or otherwise out of his mind, Cap would be able to use Mjolnir against him.
Thanos. Thor nearly killed Thanos in Avengers: Infinity War with a surprise attack, but came up short in the end. This signaled that Thor is close to Thanos' power level, but other fights go to show that the Mad Titan is still the superior being. Thanos dispatched Thor with ease in Infinity War's opening scene.
While Thor's fate is unknown at this time (with the fact that he is the All-Father perhaps the only thing that saved his life), it is obvious by the battle shown in this Avengers comic that he was soundly defeated by Idol Alabaster with one ultra-strong superpower designed specifically to kill gods.
Even the regular Superman would probably be enough to defeat Thor. It would be a close match since Superman isn't as durable against magic but Thor would definitely struggle against Superman's might, more so if he's bloodlusted.
He also possesses superhuman strength, speed, agility, durability and immunity to most diseases. Thor's greatest weapon, and closest ally, is Mjolnir, an enchanted hammer forged from Uru metal, which has power over storms and can generate energy blasts known as anti-force.
By most accounts, Superman seemingly outclasses Thor in terms of raw strength, especially in earlier versions of the DC Universe. He's pulled planets, punched people into orbit, and performed all sorts of wild feats of strength.
Originally Answered: What is Thor's greatest weakness? Magic. Thor was a warrior, brash and strong. He was clever, to a degree, but nowhere near the same level as Loki or Odin, or even some of the giants.
On their own, both these noble heroes are capable of beating incredible forces. But for all Shazam's power, he does not match Thor's experience in using the more arcane elements of his abilities.
Zeus would have the home turf advantage in this fight, as he rarely leaves Olympus. However, he's also just not used to fighting like Thor is. Zeus is certainly more powerful than Thor in many ways, but he's not a fighter like Thor is.
It depends, but in all actuality it should be Loki. He is a deadly combatant, he just won't apply himself like he should. His ego is enormous, as is his ability to sabotage himself. He won't fight Thor hand to hand, he will tire him out, throw constant waves of enemy after enemy, one more obstacle after another.
Although he is an extremely skilled marksman, Clint Barton is often considered to be the weakest member of the team seeing as he's just a regular guy with a bow and arrow. That certainly means that Hawkeye one of the weakest Avengers.
Putting it all together, Thor can win against the Hulk, even if he can't kill the Jade Giant. Hulk is practically immortal and has unlimited reserves of strength and stamina, so he can keep fighting forever. Thor's endurance, while godly, is not limitless, so he will eventually lose a prolonged battle.
Of course, Thor does kill Kratos in that battle but immediately brings him back to life in a fun gameplay twist. This, however, was not related. Elsewhere the pair discussed the amount of puzzle assistance provided by side characters, something that was widely criticised after release.
Odin is basically Thor and all the other Asgardians rolled into one—though he's even wiser, more experienced, and minus one eye. As the default King of Asgard, Odin is easily the most powerful being in his realm.
Summary. Hulk and Thor fight frequently, but usually with some kind of caveat that makes a direct comparison difficult. However, in Avengers: Twilight, Hulk just took down Thor with a single hit, showcasing his limitless strength.
It's clear which of the two Avengers has more physical strength. When Thor wields Mjolnir, he can hit harder, summon deadly storms, and fly. But without his trusty hammer, Hulk genuinely earns the "strongest Avenger" title.
The Olympian and the Asgardian are evenly matched in terms of both strength and durability. For comparison, both Thor and Hercules' durability and raw power pale in comparison to the likes of Zeus - a low-key but crucial Thor: Love and Thunder spoiler for any future outings of the Olympians.
Before Thor ever got to Darkseid, he'd be tired and injured, having battled for hours to make his way to the powerful despot. A weakened Thor is still dangerous, but against Darkseid's vastly superior might, Thor would find it impossible to triumph.
Portrayed by Anthony Hopkins, Odin is the powerful ruler of the Nine Realms who has sworn to protect every kingdom under his rule. With Odin still ruling Asgard, Thanos would have easily been stopped had he made a play for the Infinity Gauntlet.
It's important to note that the rules around worthiness had been temporarily suspended to allow this to happen. As soon as the fight was over, Superman couldn't lift the hammer anymore. However, under normal circumstances, without any weird interference, Superman is worthy of Mjolnir.
Ultimately, pure strength and speed will win the fight of pantheons, with the gods-given power of Black Adam simply being too much for Thor. Black Adam has speed on the level of a Kryptonian or even the DCU's version of The Flash, which is simply too much for Asgard's former prince.
For His Family To Be Torn Apart. Having spent over a thousand years in the company of Odin, Frigga, and Loki, it's understandable that Thor didn't want to lose his family. One of Thor's biggest fears was for them to be torn apart, but he had to suffer outliving them after all three died before his eyes.
