It's Depends on your measuring stick for 'current' and 'greatest' but I would like to know your opinion.
Not sure who would be right now.... (Whomever it is, you're not going learn his name or get access to his trading.) But the "greatest trader of all time" would have been Mr. Spock... the epitome of logic and discipline.
Oliver Velez is probably one of the best traders who make gains public. He is also a great coach and mentor.
Dan Zanger holds the world record for one-year stock market portfolio appreciation, gaining over 29,000%. In around two years, he turned $11,000 into $42 million. Fortunemagazine, December 18, 2000, wrote an extensive article on Zanger, covering his trading style and personality.
Then why is he constantly running with his students money? Constantly shutting down, taking the money and starting back up again under a different company name and then trying to act like it wasnt him that stole the money?