Warren Buffett

These people you are asking about all have extensive histories and it is pretty difficult to sum their success up. Still, here is a brief intro and you can follow the link for more.

Warren Buffett is an American business magnate, investor, and philanthropist. He is widely regarded as one of the most successful investors in the world. Often introduced as "legendary investor, Warren Buffett",[5][6] he is the primary shareholder, chairman and CEO of Berkshire Hathaway.[7] He is consistently ranked among the world's wealthiest people. He was ranked as the world's wealthiest person in 2008[8] and is the third wealthiest person in the world as of 2011.[9] In 2012, American magazine Time named Buffett one of the most influential people in the world.[10]

Buffett is called the "Wizard of Omaha", "Oracle of Omaha"[11], or the "Sage of Omaha"[12] and is noted for his adherence to the value investing philosophy and for his personal frugality despite his immense wealth.[13]