William Vickrey
The announcement of his Nobel Prize was made just three days before he died. Vickrey died during his journey to a conference of Georgist academics that he helped found. He had never missed one of these conferences in 20 years. His Nobel award was accepted by C. Lowell Harriss. Harriss worked with Vickrey  at the Columbia University economics department. A Nobel Prize has only been awarded after the deaath of a person three other times.