Not nice to know! -- What made them wicked? -- A world of wickedness - No. 10 : Erik Bloodaxe -- No. 9 : Henry VIII -- No. 8 : Cleopatra - No. 7 : King John -- No. 6 : Maximilien Robespierre -- No. 5 : the first Chinese emperor -- No. 4 : Ivan the Terrible -- No. 3 : Vlad Tepes -- No. 2 : Leopold II -- No. 1 : Nero.