Ronan the Accuser

Played by Lee Pace

Ronan the Accuser is a radical Kree militant who rejected a peace treaty between the Kree Empire and the planet Xandar, continuing his private war using ships and soldiers loaned by Thanos in exchange for retrieving an Infinity Stone. Wielding a cosmi-powered war hammer, he intended to use the stone to destroy Xandar's capital before being stopped by the Guardians of the Galaxy and Nova Corps. Read more →

First turns up in Guardians of the Galaxy.