Ant-Man

Ant-Man AKA Henry “Hank” Pym was an Avenger from the very beginning. He joined the team in Avengers #1 in September of 1963 and has regularly been in and out of the line-up ever since.

He is the one character who has been in the Avengers under the most guises. In addition to Ant-Man, he has also represented the team as the likes of Giant-Man, Yellowjacket and Goliath and his size-manipulation powers are very important to the team – as is his near unrivaled level of genius.

Although he’s yet to join the team on screen, the Scott Lang version of the character (played by Paul Rudd) has indeed had his own movie in the Marvel Cinematic Universe (Hank Pym is his older mentor, played by Michael Douglas). He will first appear alongside the Avengers in this year’s Captain America: Civil War and will join the team after that.