Joe Ranft

Joseph Henry Ranft (March 13, 1960 – August 16, 2005) was an American screenwriter, animator, storyboard artist and voice actor, who worked for Pixar Animation Studios and Disney at Walt Disney Animation Studios and Disney Television Animation. His younger brother Jerome Ranft is a sculptor who also worked on several Pixar films.
Description above from the Wikipedia article Joe Ranft, licensed under CC-BY-SA, full list of contributors on Wikipedia.