One of the greatest authors of all time, well known for his Hitch Hikers Guide to the Galaxy series of books, the radio series came first, there were also the record releases, television series, and film. He also wrote 'Dirk Gently's Hollistic Detective Agency, The Long Dark Tea Time of the Soul, Last chance to See, Meaning of Liff, the Deeper Meaning of Liff,' Made the computer games of 'Starship Titanic, and the Hitchhikers game' and started writing 'the Salmon of Doubt.' He also started H2G2, now overrun with BBC managers.
There's probably loads I've missed out, the man's accomplishments are hard to gather together.
Douglas Adams... R.I.P.