In 1982, Sir Ben Kingsley won an Academy Award and a heap of others for his portrayal as Mahatma Gandhi, despite the obvious differences in appearance (although he is of Indian descent on his father's side). Curiously, the acclaim was nowhere to be found when he dipped into his heritage again, playing the cross-eyed, heavily-accented, masturbation joke of a character Guru Tugginmypudha in Mike Myers' colossal misfire The Love Guru. If he hasn't been banned from India, he should be.
8. Sir Ben Kingsley as Guru Tugginmypudha in The Love Guru (2008)