Final answer:
Art Carney won the supporting actor Emmys in 1954 and 1955 for his role as Ed Norton on 'The Jackie Gleason Show'.
Step-by-step explanation:
The actor who won the supporting actor Emmys in 1954 and 1955 for 'The Jackie Gleason Show' was Art Carney. He played the beloved character Ed Norton, who was the best friend of Ralph Kramden, played by Jackie Gleason himself. Art Carney's portrayal of the whimsical and cheerful sewer worker earned him much acclaim, making him a significant figure in television history. Notably, Ralph Kramden and Ed Norton are character names, while Jackie Gleason was the star and creator of the show.