Jesse Livermore
In a time when accurate financial statements were rarely published, getting current stock quotes required a large operation, and market manipulation was rampant, Livermore used what is now known as technical analysis as the basis for his trades. His principles, including the effects of emotion on trading, continue to be studied.
Peter Lynch
As the manager of the Magellan Fund at Fidelity Investments between 1977 and 1990, Lynch averaged a 29.2% annual return, consistently more than double the S&P 500 stock market index and making it the best-performing mutual fund in the world.
Charlie Munger
Warren Buffett has described Charles Munger as his partner. Munger served as chairman of Wesco Financial Corporation from 1984 through 2011. He is also chairman of the Daily Journal Corporation, and a director of Costco Wholesale Corporation.
W.D. Gann
William Delbert Gann, was a finance trader who developed the technical analysis methods like the Gann angles and the Master Charts, where the latter is a collective name for his various tools like the Spiral Chart (also called the Square of Nine), the Hexagon Chart, and the Circle of 360.