6. David Dreman

Quote: "If you have good stocks and you really know them, you'll make money if you're patient over three years or more"

David Dreman is a famous investor who has written books such as ‘Contrarian Investment Strategy: The Psychology of Stock Market Success’. His investment strategy is that he believes in taking contrarian calls.

He buys stocks that have a low price-earnings ratios, low price-to-book value ratios and higher than average yield. According to his belief his stock picking technique can outperform the markets always.

7. Carl Icahn

Quote: "You learn in this business … If you want a friend, get a dog."

Carl Icahn is a private equity investor and modern day corporate raider, who buys large stakes in companies and attempt to get voting rights in order to increase shareholder value. Some of his holdings include Time Warner, Yahoo, Clorox and Blockbuster Video according to Investopedia.

According to him there is only one piece of advice to act upon and that is your own exhaustive research based on facts obtained from trusted sources. Other advice can be considered and verified but it shouldn't be a sole reason to commit money.