Captain America Cap is one of the few mortals able to not only lift Mjolnir but wield its full power, making him someone who can beat Thor. Assuming the reason for their battle is because Thor is possessed or tricked, Cap would be able to use Mjolnir against him.
Hulk has traditionally been seen as the strongest Avenger physically — and for good reason, though he's been subdued by both Iron Man and Thor. Then he got wrecked in the opening scene of "Infinity War" and we haven't seen him fight since.
The Hulk is an incredibly powerful Avenger in the MCU. He effortlessly defeated Chitauri Leviathan and Loki in the first Avengers movie, and in Thor: Ragnarok, he proved his dominance by winning a gladiatorial fight against Thor.
There have been several moments in the MCU that prove that Thor is actually the strongest Avenger. Chris Hemsworth debuted as Thor back in the MCU Phase 1's Thor, and has become one of the longest-running characters in the MCU, and so far, the only original Avenger to have four solo movies under his belt.
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.
Moon Knight's power level is often up for debate, but every night he demonstrates that he is capable of taking out each of the Avengers.
Captain Marvel is the most powerful and powerful Avenger in the Marvel Cinematic Universe (MCU). Her incredible powers and determination have made her a valuable member of the Avengers.
Tony Stark is the smartest of them all, having been responsible for some of the most incredible inventions to have ever graced the Marvel universe, including the Arc Reactor and one of the most sophisticated artificial intelligence systems known to man.
While Thor is powerful and his strength is said to be unmatched, he is not strictly immortal like other mythological gods. He is susceptible both to aging and to being killed in battle. Like other Norse gods, he must consume special apples kept by the goddess Idun to keep from aging.
Superhuman Stamina: His stamina is almost limitless. Thor survives the Time Stone of time. While still aging physically, he retains his youthful appearance far longer than humans, barely changed after Thanos used the Time Stone to age by several centuries, and will only grow stronger the older he gets.
Apart from his physical abilities, Peter is an intellectually-gifted scientific teen genius and has a prodigious aptitude in the physical sciences, with a high IQ level of around 250.
#1 Iron Man
Played by Robert Downey Jr., Iron Man consistently ranks as one of the most popular characters, in the Marvel Cinematic Universe—and for a good reason.
While Thor is one of the most powerful beings in the MCU, it is known that Scarlet Witch's powers are superior.
So long as the Spirit of Vengeance resides inside them, their human host has the potential to physically live forever. As an added bonus, they remain ageless. In Ghost Riders: Heavens on Fire #6, Johnny Blaze states that since God created the Ghost Riders, only God can destroy them.
There are few beings in the universe Thanos is scared of and the Hulk is one of them. There's a good reason for this, Hulk's strength is potentially limitless. One of the things that makes the Hulk so dangerous is that if you can't take him out quickly, you're never going to take him out.
In my mind the answer to that is Barry Allen. While he's not the “original” Flash, he is the one that made the name famous. Barry Allen was the fastest man alive for many years. He even sacrificed himself to save the universe and ended up in the Marvel Universe.
Thor. Blessed with the powers and long life of a god, Thor was undoubtedly the most powerful member of the initial version of the Avengers. Not only can he fly and transport between worlds, but he was also the only one capable of taking down Thanos, even after he had assembled all six Infinity Stones.
Thanos (with the Infinity Gauntlet)
With the gauntlet, Thanos is without a doubt the greatest threat to the universe, making Captain Marvel simply no match for the Mad Titan.
But in All-Out Avengers #5, it's Captain Marvel's turn to run out of luck as Spider-Man defeats Carol Danvers with a disturbing attack involving webs directly shot down her throat. Spider-Man and Captain Marvel, despite being very different heroes, actually share a romantic history.
Thanos (Avengers: Infinity War, Avengers: Endgame)
Batman isn't just number one of all the superheroes who have no superpowers, he's arguably the number one superhero ever created.