Idi Amin Dada, the third president of Uganda ruled from 1971 to 1979. His rule was characterised by political repression, ethnic persecution, extrajudicial killings, nepotism, corruption, and gross economic mismanagement.
Amin was known to have egotistical behaviours and even bestowed on himself the title, “His Excellency, President for Life, Field Marshal Al Hadji Doctor Idi Amin Dada, VC, DSO, MC, Lord of All the Beasts of the Earth and Fishes of the Seas and Conqueror of the British Empire in Africa in General and Uganda in Particular.” Sigh.
Besides all that, he was also the only black ruler who came close to making a white man a slave. As evidenced by the photo below, he made them carry him for show off.