Perhaps the most obvious character that was more powerful than the Scarlet Witch was the One Above All, who acted as the "god" of the Marvel universe.
Rogue is one of the X-Men's most formidable members. Her mutant ability to absorb the powers of others makes her a great powerhouse, as she can have the powers of anyone she touches. This ability has become even more potent since she mastered it, and it was also how she was able to kill Scarlet Witch.
Wanda Maximoff (better known as her superhero alter-ego, the Scarlet Witch) is arguably the most powerful sorcerer/magic user in the entire Marvel Universe.
She concluded her mass murder by killing Professor Xavier, arguably the most powerful telepath in the Marvel universe. The mere fact that she can single-handedly destroy five of Earth's mightiest heroes easily makes her the strongest MCU character.
While the Scarlet Witch is one of the most powerful beings in the Marvel Universe, her greatest weakness proves even Spider-Man can beat her.
While Thor is one of the most powerful beings in the MCU, it is known that Scarlet Witch's powers are superior.
Hercules / Zeus
In fact, he is considered by many authorities to be the physically strongest character Marvel has ever created. According to legend, he replaced Atlas in holding the sky on his shoulders.
Wanda was still a formidable adversary, capable of tipping the scales in favor of Ultron (James Spader) or the Avengers, depending on who she was helping. Still, without her Chaos Magic from Marvel Comics, Wanda was not more powerful than Thor or Hulk.
If it came down to it and Odin saw Scarlett Witch as a threat to the Universe and Multiverse and decided to try and take her down, who would win? Odin. Odin could probably kill her but not in a strait up fight.
The source of Wanda's unnatural abilities stem from a two-fold base; unparalleled mastery of actual magic and an innate power to warp reality. Due to exposure to mystic energies and forces at an early age, Wanda may reshape reality to various extremes.
Scarlet Witch is indeed powerful and has overpowered magical abilities that make her a threat in both the comics and the MCU. But the thing is that Dark Phoenix is a threat to the entire universe as her powers are cosmic-level. In that regard, it is easy to see why Dark Phoenix is the more powerful character.
Scarlet witch's biggest weakness is her durability. The only mode of defence was her powers. So her durability depended on her powers. She had two different stages in her power: before Infinity war and after Endgame.
God (One Above All)
The One Above All is the ultimate source of life and creation and the architect/creator of the Multiverse and everything that exists. The One Above All has stated that its "only weapon is love", which was further stated by the Watcher.
Scarlet Witch would obliterate The Hulk. Ray Hamilton no one said Spider-Man and he was the first to defeat Hulk.
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.
However, with Doctor Strange in the Multiverse of Madness, the Scarlet Witch's candidacy is thrown for a loop. That's because the film reaffirms the angry version of Wanda wouldn't have been able to kill Thanos.
The Verdict: Scarlet Witch Is Stronger Than Captain Marvel
That said, Wanda has an edge due to Chaos Magic and her reality-warping abilities. Her telekinesis alone could nearly kill Thanos faster than Carol's punches.
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.
Wanda broke Thanos' sword which is made from Uru, meaning she can also destroy Thor's hammer. : r/marvelstudios.
In the Infinity Conflict storyline, Astral Regulator Thanos defeated The One Above All. This was achieved by using the powerful artifacts of creation known as the Astral Regulators, which The One Above All created to prevent the universes from colliding with each other and causing destruction.
Superman is Superman. He is going to be on every list that ranks superheroes by speed, strength, durability, endurance, etc. You name it, he's on it. Of course, Superman is much, much faster than a regular old bullet.