The Doctor (Doctor Who)

Although he’s not a typical Avenger – in the sense that he doesn’t really get his hands dirty when it comes to combat – the Doctor would be an excellent addition in the team and would offer something very different to anything they’ve had before.

With an intellect that makes the likes of Tony Stark and Bruce Banner look like dimwitted little children, he could aid in the building of equipment, help to deduce difficult situations and counter the extreme intelligence of villains like Doctor Doom and Thanos.

Moreover, the equipment he would bring to the table – the likes of the TARDIS and the Sonic Screwdriver – could be invaluable to the team when it comes to defeating a wide variety of powerful opponents.