Jughead Jones

From Muppet Wiki

Jughead Jones is a character from the Archie comic book franchise. Created in 1941, Jughead is Archie's gluttonous best friend, known for his distinctive beanie. In 1968, Filmation Studios created an animated series based on the Archie characters, originally titled The Archie Show, which continued in various formats for ten years.

The animated Jughead, voiced by Howard Morris, appeared on Sesame Street in an insert about the letter J.