He co-starred in Cattle Queen of Montana with Ronald Reagan, in Apache Woman with Lloyd Bridges and was featured in Ed Wood's The Bride and the Beast, and Universal's first color sci-fi film, This Island Earth.

He moved into television, where he appeared on the shows Bat Masterson, The Rifleman, 77 Sunset Strip, in two episodes of Maverick "Island In The Swamp", plus "The Cats of Paradise", in which he played a spoof of "Paladin" from Have Gun, Will Travel opposite James Garner and Buddy Ebsen), The Twilight Zone, Tombstone Territory and others.

In 1968, Fuller attacked a police officer in Los Angeles, and was shot in the chest, leaving him in critical condition.

[1] Fuller recovered and in the early 1970s attempted a comeback and landed small roles in a few films and TV programs.

In addition, Fuller confirmed that he converted to Mormonism following his marriage to Lansing and that he also was a lifelong registered Republican.