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David Letterman
David Michael Letterman (born April 12, 1947) is an American television host, comedian, writer and producer. He hosted late night television talk shows for 33 years, beginning with the February 1, 1982, debut of Late Night with David Letterman on NBC and ending with the May 20, 2015, broadcast of Late Show with David Letterman on CBS. In total, Letterman hosted 6,080 episodes of Late Night and Late Show, surpassing his friend and mentor Johnny Carson as the longest-serving late-night talk show host in American television history. In 1996, Letterman was ranked 45th on TV Guide's 50 Greatest TV Stars of All Time. In 2002, The Late Show with David Letterman was ranked seventh on TV Guide's 50 Greatest TV Shows of All Time.He is also a television and film producer. His company, Worldwide Pants, produced his shows as well as The Late Late Show and several primetime comedies, the most successful of which was Everybody Loves Raymond, now in syndication and streaming.
Several late-night hosts have cited Letterman's influence, including Conan O'Brien (his successor on Late Night), Stephen Colbert (his successor on The Late Show), Jimmy Fallon, Jimmy Kimmel, Jon Stewart, and Seth Meyers. Letterman currently hosts the Netflix series My Next Guest Needs No Introduction with David Letterman.
Source: Wikipedia