I vote for/against the following. I am exposing my ignorance here, but it only came to 155 this time around. I will attribute my lack of knowledge of serial killers to a guess that many of them are American (ditto gangsters), and I am not American. I think I recognised the British killers, though. I have no excuse for lack of knowledge of historical world leaders:
Akhenaton (14th Century BC) Pharoah of Egypt
Sennacherib (8th century BC) King of Assyria
Pheidon of Argos (7th century BC) Tyrant of Athens
Lucius Tarquinius Superbus (535–496 BC) “Tarquin the Proud” King of Rome
Polycrates (6th century BC) Tyrant of Samos
Qin Shi Huang (259–210 BC) Emperor of China
Valeria Messalina (c.18-48 AD) “Empress” of Rome
Domitian (51-96 AD) Emperor of Rome
Fredegund (6th century AD) Queen of the Franks
Wu Zetian aka Wu Hou (625-705) Empress of China
Harun al-Rashid (763-809) Caliph of Baghdad
Olga (890-969) Regent of Russia
Basil II (958–1025) “Basil the Bulgar Slayer” Byzantine Emperor
Peter (1334-1369) “Pedro the Cruel” King of Castile
Timur (1336-1405) “Tamerlane” Ruler of Samarkand
Gian Galeazzo Visconti (1351-1402) Duke of Milan
Gilles de Rais (1404-1440) Serial killer
Catherine de’Medici (1519-1589) Regent of France
Ivan IV Vasilyevich (1530-1584) “Ivan the Terrible” Tsar of Russia
Grainne Ni Mhaille aka Grace O’Malley (c.1530–c.1603) Pirate
Toyotomi Hideyoshi (c.1536-1598) Ruler of Japan
William Kidd (c.1645–1701) Pirate
Elizabeth Bathory (1560–1614) Countess of Transylvania serial killer
Aurangzeb (1618-1707) Mughal Emperor of India
Francois l’Olonnais (c.1635-c.1668) Pirate
Henry Every (c.1656-c.1699) Pirate
John “Calico Jack” Rackham (1682-1720) Pirate
Bartholomew Roberts (1682-1722) Pirate
Edward Low (c.1690–c.1724) Pirate
Nader Shah (c.1693-1747) Shah of Persia
Frederick William I (1688–1740) King of Prussia
Anne Bonny (1702-1782) Pirate
Edward England (birth unknown - died c.1720) Pirate
William Lewis (birth unknown - died 1727) Pirate
Tipu Sultan (1750-1799) Sultan of Mysore
Paul I (1754-1801) Tsar of Russia
Jose Gaspar Rodriguez de Francia (1766–1840) Dictator of Paraguay
Jean Laffite (c.1776–c.1823) Pirate
Ranavalona I (c.1782–1861) Queen of Madagascar
Agustin de Iturbide (1783–1824) Dictator of Mexico
Cheng I Soa (1784-1844) - Pirate
Ludwig I (1786–1868) King of Bavaria
Juan Manuel de Rosas (1793-1877) Dictator of Argentina
Benito de Soto (1805-1830) Pirate
Ferdinand II (1810–1859) King of Naples and Sicily
Hong Xiuquan (1814-1864) “Heavenly King” Warlord of China
Francisco Solano Lopez (1826-1870) Dictator of Paraguay
Antonio Guzman Blanco (1829-1899) President of Venezuela
Grace Marks (born 1828 death unknown) Murderer
Porfirio Diaz (1830-1915) President of Mexico
Mary Ann Cotton (1832-1873) Serial killer
Cixi (1835-1908) “Tzu-hsi” Doweger Empress of China
Charles Guiteau (1841-1882) Assassin
Ludwig II (1845-1886) King of Bavaria
Jane Toppan (1854-1938) Serial killer
Theodore II (1855-1868) Emperor of Ethiopia
H.H. Holmes aka Herman Webster Mudgett (1861-1896) Serial killer
Mwanga II (1868-1903) Kabaka of Buganda
Henri Desire Landru (1869-1922) Serial killer
Albert Fish (1870-1936) Serial killer
Leon Czolgosz (1873-1901) Assassin
Mehmed Talat aka Talat Pasha (1874–1921) Leader of Turkey
Syngman Rhee (1875-1965) President of South Korea
Fritz Haarmann (1879-1925) Serial killer
Ismail Enver aka Enver Pasha (1881-1922) Leader of Turkey
Peter Kurten (1883-1931) Serial killer
Chiang Kai-shek (1887-1975) Ruler of Republic of China
Antonio de Oliveira Salazar (1889-1970) Ruler of Portugal
Frank Costello (1891-1973) Gangster
George “Bugs” Moran (1891-1957) Gangster
Carl Panzram (1891-1930) Serial killer
Rafael Trujillo (1891-1961) Dictator of the Domincan Republic
Francisco Franco (1892-1975) Dictator of Spain
Dean O’Banion (1892-1924) Gangster
Anastasio Somoza Garcia (1896-1956) Dictator of Nicaragua
Louis “Lepke” Buchalter (1897-1944) Gangster
Charles “Lucky” Luciano (1897-1962) Gangster
Earle Nelson (1897-1928) Serial killer
Marcel Petiot (1897-1946) Serial killer
Jake Bird (1901-1940) Serial killer
Ngo Dinh Diem (1901-1963) President of South Vietnam
Sukarno (1901-1970) President of Indonesia
Meyer Lansky (1902-1983) Gangster
Dutch Schultz (1902-1935) Gangster
Joseph Bonanno (1905-2002) Gangster
Ed Gein (1906-1984) Serial killer
Ilse Koch (1906-1967) Nazi
Sam Giancana (1908-1975) Gangster
Bruno Ludke (1908-1944) Serial killer
John George Haigh (1909-1949) Serial killer)
Kwame Nkrumah (1909-1972) Leader of Ghana
Kim Il-sung (1912-1994) Leader of North Korea
Alfredo Stroessner (1912-2006) Dictator of Paraguay
Howard Unruh (1921-2009) Spree killer
Efrain Rios Montt (born 1926) Dictator of Guatemala
Marie Noe (born 1928) Serial killer
Pol Pot (1928-1998) Leader of Cambodia
Mobutu Sese Seko (1930-1997) Dictator of the Congo
Albert DeSalvo (1931-1973) “The Boston Strangler” serial killer
Paul Biya (born 1933) President of Cameroon
Donald “Pee Wee” Gaskins (1933-1991) Serial killer
Joachim Kroll (1933-1991) Serial killer
Than Shwe (born 1933) Dictator of Myanmar
Richard Kuklinski (1935-2006) Contract killer
James Porter (1935-2005) Priest, child abuser
Andrei Chikatilo (1936-1994) Serial killer
Henry Lee Lucas (1936-2001) Serial killer
Choummaly Sayasone (born 1936) Ruler of Laos
Audrey Marie Hilley (1937-1987) Murderer
Mengistu Haile Mariam (born 1937) Ruler of Ethiopia
Islam Karimov (born 1938) President of Uzbekistan
Charles Starkweather (1938-1959) and Caril Ann Fugate (born 1943) Spree killers
Dean Corll (1939-1973) Serial killer
Ali Khamenei (born 1939) Leader of Iran
Saparmurat Niyazov (1940-2006) President of Turkmenistan
Richard Speck (1941-1991) Serial killer
Charles Whitman (1941-1966) Spree killer
John Wayne Gacy (1942-1994) Serial killer
Hissene Habre (born 1942) Dictator of Chad
Hu Jintao (born 1942) Leader of People’s Republic of China
James Oliver Huberty (1942-1984) Spree killer
Teodoro Obiang Nguema Mbasogo (born 1942) Dictator of Equatorial Guinea
Frederick Cowan (1943-1977) Spree killer
Gary Heidnik (1943-1999) Serial killer
Omar al-Bashir (born 1944) President of Sudan
Isaias Afwerki (born 1945) President of Eritrea
Sammy Gravano (born 1945) Gangster
Leonard Lake (1945-1985) and Charles Ng (born 1960) Serial killers
Edmund Kemper III (born 1948) Serial killer
Pedro Lopez (born 1948) Serial killer
Mark Essex (1949-1973) Spree killer
Gary Ridgway (born 1949) “The Green River Killer” serial killer
Kenneth Bianchi (born 1951) and Angelo Buono Jr. (1934-2002) “The Hillside Starnglers” serial killers
Samuel Doe (1951-1990) Dictator of Liberia
Gerald Stano (1951-1998) Serial killer
Nikolai Dzhurmongaliev (born 1952) Serial killer
Thomas Hamilton (1952–1996) Spree killer
Bobby Joe Long (born 1953) Serial killer
Aleksandr Lukashenko (born 1954) President of Belarus
Meles Zenawi (born 1955) Ruler of Ethiopia
George Hennard (1956-1991) Spree killer
Aileen Wuornos (1956-2002) Serial killer
Anatoly Onoprienko (born 1959) Serial killer
Joel Rifkin (born 1959) Serial killer
The Zodiac Killer (circa 1960’s) Serial killer
Michael Ryan (1960-1987) Spree killer
Richard Ramirez (born 1960) Serial killer
Westley Allan Dodd (1961-1993) Serial killer
Paul Bernardo (born 1964) and Karla Homolka (born 1970) Serial killers
Marc Lepine (1964-1989) Spree killer
Bashar al-Assad (born 1965) President of Syria
Martin Bryant (born 1967) Spree killer
Mswati III (born 1968) King of Swaziland
Susan Smith (born 1971) Murderer