As Thor reached to pick his hammer,
According to Norse mythology, Thor dies in an epic battle with a monstrous serpent named Jörmungandr, also known as the Midgard (middle earth) Serpent. Both opponents meet their death in this battle, which is a part of the ultimate destruction of the current world, known as Ragnarök.
Within the MCU, they have established Thor as an immortal, making him an invaluable member of the Avengers and one of the most powerful beings to ever exist. As a result he can be killed in battle, but he will always return to his body one way or another.
Thor is repeatedly vanquished by the 5 new Phoenix hosts over the course of 12 issues: Colossus, Namor, Cyclops, Magik, and Emma Frost. Colossus even manages to knock Mjolnir out of Thor's hands at one point, demonstrating the strength of Phoenix and why it should not be trifled with.
Anything that hits hard enough or negates his durability. Thor is extremely durable, but not invulnerable.
Hercules / Zeus
He ranks above Thor here because he's technically the stronger of the two. In fact, he is considered by many authorities to be the physically strongest character Marvel has ever created.
Yellowjacket assumed that Fury will try to recruit Thor for the Avengers Initiative and decided that he must die as well. As Thor reached to pick his hammer, Yellowjacket tapped on Hawkeye's arm, causing him to misfire and shoot an arrow at Thor, which resulted in his death.
Thanos's power, cunning, and years of experience have allowed him to outsmart and defeat some of the most powerful beings in the universe. All manners of beings have fallen before Thanos and while the Avengers are powerful, if Thanos really put his mind to it, he could end the Avengers at any moment.
2 Thor Is Just Too Much For Iron Man
Thor beat Iron Man easily. Iron Man was basically powerless against the God of Thunder. Thor stopped short of beating Iron Man to death, but he made sure that Iron Man knew that there was nothing he could do to Thor if Thor pressed the issue.
Even without the Infinity Gauntlet, Thanos has proven himself to be a hugely powerful threat, often taking on entire teams of Avengers at once. However, it is with the Infinity Gauntlet that he can most consistently defeat the Avengers.
Franklin Richards is the immortal hero of the multiverse
In the Marvel comics, Franklin Richards has the power to make thoughts real. But in one of the alternate universes, Richards of Earth 12665 has become immortal. He is the adult version of the character and managed to gain powers to defeat two celestials.
Like most Asgardians, Thor is vulnerable to particular types of magic. One type of magic of Thor finds himself particularly vulnerable to that magic meant to charm an opponent. This makes Thor vulnerable to foes like Enchantress and her younger sister Lorelei.
Thor, the god of Thunder, was undoubtedly the most powerful member of the original Avengers. His power continues to grow in the Marvel Cinematic Universe.
Loki – Thor's archenemy and adoptive brother. The son of Laufey, ruler of the Frost Giants of Jotunheim, one of the "Nine Worlds" of the Asgardian cosmology. He is a master of spellcasting and trickery.
Odin has pretty clearly been shown to be demonstrable more powerful than the other gods. Odin's Odinforce has far outstripped anything Zeus's magical lightning bolts have ever done.
Simply put Thor can best Hulk in a fight because he wields Mjolnir and is a god. Complexly said, Hulk can't defeat a divine god with a mighty hammer that lets him blast energy beams, fly, and summon a kinds of weather.
Over 12 issues, Thor is defeated multiple times by the five new Phoenix hosts: Cyclops, Colossus, Emma Frost, Namor, and Magik. At one point, Colossus is even able to smash Mjolnir away from Thor's hands, proving Phoenix is a strong force not to be messed with.
Armed with his new tools for battle, Thor defeats the Angry Titan by smashing his head with Mjolnir. In Avengers: Infinity War, Thor managed to lethally wound the Mad Titan with the Stormbreaker despite taking on the full force of the Infinity Gauntlet.
Confirmed Hawkeye Is the Most Useless Avenger.
Thanos. Perhaps the Avengers villain that MCU fans are most familiar with, Thanos's motivations in the comics are slightly different, but his power remains a constant. He's a true force to be reckoned with, and one that inspires a legion of his own that also has to be contended with.
Thanos only kills that pose a threat at the moment (e.g. Loki and Heimdall). Thanos views everyone as being reasonable and doesn't expect people to agree with his 1/2 the universe ideology, which is why he'll let Thor play the lottery and survive or die later.
Before the opening title even appeared, several well-known characters met their demise, including Loki. While behind the scenes of the shoot was more lighthearted, on-screen fans were heartbroken. Thanos kills Loki brutally and tragically while Thor helplessly watches.