Who was NOT a founding member of the original Avengers?

If you're a fan of the Avengers, you have DC's Justice League to thank — following the success of the superhero team's comics, Stan Lee's boss basically told him to get cranking on his own version. And voila, the Avengers were born.

But that was like 60 years ago. In 1963 the very first Avengers comic book came out. Since then they've cycled through seemingly endless iterations between comics, film, video games, and basically any other medium in existence.

Who were those very first superheroes that were among Earth's mightiest?

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