Admittedly 'best' is a misnomer and 'above average and at least competent' is a better word. Genghis Khan, Vlad the Impaler, Fu Sheng, Ivan the Terrible, Qin Shi Huang, Babur, Pinochet, King Mahendra of Nepal, Wu Zetian, etc were all murderers, and some rapists, but were competent enough to...