Ave atque vale Harold Ramis (aka Egon from Ghostbusters, among other things), age 69

He was the main writer of the Ghostbusters movies, and director/co-writer of Groundhog Day and National Lampoon's Vacation, among others. More at The Guardian and at IMDB.

A typical bit of writing:

[Egon is running tests on Louis, who has been possessed by Gozer and is now the Keymaster] 

Dr. Egon Spengler: Vinz, you said before you were waiting for a sign. What sign are you waiting for? 

Louis: Gozer the Traveler. He will come in one of the pre-chosen forms. During the rectification of the Vuldrini, the traveler came as a large and moving Torg! Then, during the third reconciliation of the last of the McKetrick supplicants, they chose a new form for him: that of a giant Slor! Many Shuvs and Zuuls knew what it was to be roasted in the depths of the Slor that day, I can tell you!