He is best known for playing Ed Norton , opposite Jackie Gleason 's Ralph Kramden in the situation comedy `` The Honeymooners '' , and for winning the Academy Award for Best Actor for his role in `` Harry and Tonto '' .
He is best known for playing Ed Norton , alongside with Jackie Gleason 's Ralph Kramden in the situation comedy `` The Honeymooners '' , and for winning the Academy Award for Best Actor for his role in `` Harry and Tonto '' .