After I read Hart's list, I decided to come up with my own. I know that many of the entries are questionable and probably there a lot better entrants than these but oh well.
- Mohammed
- Aristotle
- Tsai Lun (credited with the invention of paper)
- Johann Gutenberg
- Jesus of Nazareth
- Paul of Tarsus
- Shih Huang Ti
- Louis Pasteur
- Plato
- Siddhartha Guatama
- Confucius
- Abraham (reportedly the founder of Judaism)
- Isaac Newton
- Euclid
- Sri Krishna (since I included Abraham, I'm going to include him too, his historiocity wasn't challenged until Christian missionaries did so)
- Tim Berners Lee (invented the world wide web (with help))
- Adolf Hitler
- James Watt / Matthew Boulton (Watt invented it, but Boulton manufactured it and made it into big business)
- Constantine I (the Great)
- Genghis Kahn
- Thomas Edison
- Karl Marx
- Alexander the Great
- Albert Einstein
- # Nikolai Tesla (invented the radio as found by the Supreme Court & pioneered AC polyphase power distribution system)
- # Christopher Columbus
- # Hernan Cortes
- # Nicolas Copernicus
- # Socrates (just because of his reputation)
- # Philo T. Farnsworth (invented electronic television that most closely resembles contemporary ones)
- # Asoka (for turning Buddhism from a tiny sect into a world religion, brought Mauryan empire to largest land extent)
- # Moses
- # Gavrilo Princip (unwittingly, triggered the two World Wars and Cold War)
- # Augustus Caesar
- # Henry Bessemer
- # Sui Wen Ti (reunified China)
- # Martin Luther
- # Umar (greatly expanded the Islamic empire outside of Saudi Arabia and most responsible for establishing the Islamic government of today, and most of his conquests have stayed Muslim)
- # Pope Urban II (his speech ignited the Crusades)
- # Galileo Galilei
- # Sigmund Freud
- # St. Thomas Aquinas
- # Charles Darwin
- # Alexander Graham Bell (telephone would have been invented anyways without him, but still beat Root to it)
- # Charlemagne
- # Nicolas von Otto (developed a car engine that most closely resembles contemporary ones)
- # William the Conqueror
- # Francisco Pizarro
- # James Clerk Maxwell
- # Adam Smith
- # Saint Clement of Ohrid (traditionally, credited with the invention of the Cyrillic alphabet)
- # Napoleon
- # Vladimir Lenin
- # Lao Tse
- # Zoroaster
- # Galen (his emphasis on investigation and observation influenced Arabic science and he was the leading medical authority in the west for around 1400 years)
- # Ibn Al-Haytham ("Alhacen," I read a lecture on him that convinced me to put him on here.)
- # Wilbur & Orville Wright (Wright brothers)
- # Bardeen, Brattain, Shockley (invented the transistor)
- # St. Augustine
- # Cyrus I (the Great)
- # Menes (started the dynastic tradition of Egypt)
- # George Washington
- # Steve Jobs / Steve Wozniak (invented the personal computer)
- # Queen Isabella & Ferdinand
- # William Shakespeare
- # Michael Faraday
- # Jack Kilby / Robert Noyce (for inventing the silicon chip)
- # William T. G. Morton
- # Mao Zedong
- # John Locke
- # Alan Turing
- # Richard Arkwright
- # Sir Alexander Fleming
- # Muawiya I (of the Umayyad dynasty)
- # Adi Sankara (revived Hinduism after Buddhism and Jainism were starting to take over Southeast Asia)
- # Antoine Lavoisier (downgraded because I don't know how much of the credit goes to al-Biruni, etc.)
- # Simon Bolivar
- # Maharshi Veda Vyasa (I'm going to credit him with the Mahabharata and the Bhagavad Gita or just only the BG)
- # Mencius
- # Werner Heisenberg
- # Madhavira
- # John Calvin
- # Han Wu Ti ("martial emperor" not the other one)
- # Leo Baekeland (invented the first "real" plastic)
- # Julius Caesar
- # Mani
- # Edward Jenner / Lady Montagu
- # Joseph Lister
- # Al-Khwarizmi / Leonardo Fibonacci (for their parts in getting the West to adopt the Hindu-Arabic numeral system that is used by most countries in the world today (along with their other influences on math))
- # Nagarjuna
- # Louis Daguerre (would have happened anyways, but still beat Fox Talbot to it)
- # Du Fu (poet influential in China and Japan)
- # Alessandro Volta
- # Enrico Fermi
- # Johann Karl Frederich Gauss
- # Homer (wrote Greece's national epic poems)
- # Ferdowsi (wrote Persia's national epic poem)
- # Zhu Xi
- # Ibn Firnas / Salvino D'Armati (supposed inventors of reading stones and eyeglasses, respectively)