Who is Nikola Tesla? Is he greater than Einstein or Edison?

Tesla is experimental physicist. Einstein is theoretical physicist.... i dont think you can compare both, but in my point of view, he is sure greater than Edison. See this http://theoatmeal.com/comics/tesla

Thanks for A2A. Nikola Tesla (10 July 1856 – 7 January 1943) was a https://en.wikipedia.org/wiki/Serbian_American inventor, https://en.wikipedia.org/wiki/Electrical_engineer, https://en.wikipedia.org/wiki/Mechanical_engineering, and https://en.wikipedia.org/wiki/Futurist best known for his contributions to the design of the modern https://en.wikipedia.org/wiki/Alternating_current (AC)https://en.wikipedia.org/wiki/Electricity_supply system. Tesla was definitely far genius than Edison and better than Einstein. In 1882, Tesla began working for the Continental Edison Company in France, designing and making improvements to electrical http://equipment.In June 1884, he relocated to https://en.wikipedia.org/wiki/New_York_City where he was hired by Thomas Edison to work for his Edison Machine Works. Tesla's work for Edison began with simple electrical engineering and quickly progressed to solving more difficult problems. Tesla was offered the task of completely redesigning the Edison Company's https://en.wikipedia.org/wiki/Direct_current https://en.wikipedia.org/wiki/Electrical_generator. In 1885, he claimed that he could redesign Edison's inefficient motor and generators, making an improvement in both service and economy. According to Tesla, Edison remarked, "There's fifty thousand dollars in it for you—if you can do it" this has been noted as an odd statement from an Edison whose company was stingy with pay and who did not have that sort of cash on hand. After months of work, Tesla fulfilled the task and inquired about payment. Edison, claiming that he was only joking, replied, "Tesla, you don't understand our https://en.wikipedia.org/wiki/American_humor." Instead, Edison offered a US$10 a week raise over Tesla's US$18 per week salary; Tesla refused the offer and immediately resigned. When https://en.wikipedia.org/wiki/Thomas_Edison died in 1931, Tesla contributed the only negative opinion to the https://en.wikipedia.org/wiki/New_York_Times, buried in an extensive coverage of Edison's life: He had no hobby, cared for no sort of amusement of any kind and lived in utter disregard of the most elementary rules of hygiene ... His method was inefficient in the extreme, for an immense ground had to be covered to get anything at all unless blind chance intervened and, at first, I was almost a sorry witness of his doings, knowing that just a little theory and calculation would have saved him 90 percent of the labor. But he had a veritable contempt for book learning and mathematical knowledge, trusting himself entirely to his inventor's instinct and practical American sense.