Fuller became an immensely popular character actor, guest-starring in dozens of television programs including "Buckskin," "The Big Valley," "Official Detective," "The Californians," "The Restless Gun," "The Lawless Years" (in the role of "Cutie Jaffe" on May 7, 1959), "U.S. Marshal," "Panic!," "M Squad," "The Adventures of Rin Tin Tin," "The Monroes" and the "Lux Playhouse." He also appeared in the series "Strange Intruder" as a villain who dies in the third episode. In 1959, he portrayed a character accused of arson in Broderick Crawford's syndicated series, "Highway Patrol." He also made appearances in ABC's "The Life and Legend of Wyatt Earp" and Mickey Spillane's syndicated "Mike Hammer."