6. Ivan the Terrible
Born on the 25th of August 1530, Ivan IV Vasilyevich was a Grand Prince of Moscow from 1533 to 1547 and the first Tsar of Russia from 1547 to 1584.
He started as a reformer but he soon changed and led the country to bankruptcy.
He ruled by fear, murdering thousands of aristocrats and church officials, and burning cities with any whisper of rebellion.
His great feats are overshadowed by his acts of paranoia, torture, and murder.