Captain America

They would barely be able to put the sorting hat on his head before it shouted, “GRYFFINDOR!” He might as well have, “Do what is right,” tattooed on his forehead. With that being said, the most glaring Gryffindor quality he possesses is loyalty. He literally protected a brainwashed killing machine because they were war buddies. It doesn’t get much more loyal than that.
Wanda Maximoff

Just to be clear, not all Slytherins do bad things. However, Wanda is one hundred thousand percent a Slytherin and she did some not-so-great things. At the end of the day, Wanda just wants a family and she will do whatever is necessary to get one. Does that include enslaving an entire town to live the fantasy of having a family? Unfortunately. Does that include trying to steal the powers from and kill an innocent girl so you can travel to a dimension where you have a family? Yeah, that one is ringing a bell. You can’t say she isn’t determined.
Hulk

He really looks the part of a Slytherin. Mostly due to being green. With that being said, Bruce Banner is easily a Ravenclaw. They love to throw all of the super smart kids in Ravenclaw and Bruce Banner is pretty intelligent, to say the least.
Black Widow

If you’re a spy and you aren’t a Slytherin, you probably suck at your job. Also, this pick completely supports my claim that not all Slytherins are evil. See, here’s a good Slytherin!
Spider-Man

See what I did there? Peter Parker is easily a Hufflepuff as he’s the kindest Avenger. I don’t think I’ve ever seen him be mean to someone. Aside from Green Goblin, who in his defense, killed his aunt. He’s even pretty polite when he’s beating up bad guys.
Thor

Although not quite to the extent of Captain America, Thor is a pretty obvious Gryffindor. When it comes to being daring, no one seems to be quite as daring as Thor. Sometimes to a fault like many of the Gryffindors we’re familiar with.
Iron Man

Another example of Slytherin qualities being used for good! It takes quite the leader to get an entire team of heroes to follow you but Tony Stark is just the man for the job. He’s also a bit proud, to say the least. No wonder he clashes so much with Captain America. Classic Slytherin and Gryffindor.
Doctor Strange

The only more obvious Ravenclaw is Bruce Banner. Stephen Strange is a surgeon turned sorcerer. He would be a Ravenclaw prefect. If you had to pick two careers for a Ravenclaw they would be surgeon and sorcerer. Doctor Strange literally sounds like the name of a Hogwarts professor.
Hawkeye

I don’t know and I don’t care.
Captain Marvel

A former fighter pilot turned one of the MCU’s most powerful heroes? Obviously, Gryffindor. She would be the star of the quidditch team and absolutely run that house.
Ant-Man

Another pretty clear Ravenclaw although he gives off doesn’t try hard in school vibes. He wouldn’t perform the best academically in his house but everyone would find him hilarious.
Black Panther

T’Challa would be the coolest Hufflepuff in the history of the house. He shares a lot of qualities of a Gryffindor but what pushes him towards Hufflepuff is his patience and fairness. Gryffindors can be a bit rash in their decision-making whereas T’Challa is more strategic and patient. Definitely a good quality to have as a king.