Pat Buttram
From Futurepedia, the Back to the Future Wiki
Pat Buttram was an gravelly-voiced actor that portrayed several characters, most notably the sidekick of Gene Autry, as well as "Mr. Haney" in Green Acres. Buttram was also performed the voices of several Disney characters including the Sheriff of Nottingham in Robin Hood. In Back to the Future Part III, he portrayed Jeb, an old-timer in the Palace Saloon.
Pat's birth name was Emmett.
