Answer
Lee Pace has appeared in the Marvel Cinematic Universe as Ronan the Accuser. He is a Kree warrior who was once a member of the Nova Corps, but he was exiled from the corps for his ruthlessness. He eventually became the Supreme Accuser of the Kree Empire, and he sought to destroy the Xandar Nova Corps and the planet Xandar. He was eventually defeated by the Guardians of the Galaxy.