Who's the first ever Marvel SUPERHERO that defeated Dr.Doom?

This has been rather a question that me and a few people have talked about but it's never really been ended with a concrete answer. So can anyone chime in? (And not including Squirrel Girl or when it was actually a Doombot in disguise, I mean when the real Victor Von Doom was beaten in battle by a Marvel superhero only).

mr fantastic

The Fantastic Four made him flee on his first appearance and they destroyed his castle.

The explosion that messed up his face.

@joeagentofhand1: It was actually originally intended to be a minor scar that Doom couldn't handle due to vanity that he made way worse by putting his mask on before it had properly cooled when it was made.

@joshmightbe: But the explosion hit him pretty good.

@joeagentofhand1: Yes, it hit him with the full force of a retcon.

he got beat up in the 2nd grade.

@benk111: He knew magic by the second grade