The self-taught Keller broke into comics in 1941, a year after graduating from West Reading High School, creating a single-appearance feature called "The Whistler" in Dell Comics' War Stories #5. This led to work the following year with Quality Comics, where he worked in lesser or greater capacities on such comic-book series as Blackhawk and such features as "Man Hunter" and "Spin Shaw". As well, Keller drew backgrounds for Will Eisner's eight-page newspaper Sunday-supplement comic The Spirit, working with serviceman Eisner's World War II fill-in artist, Lou Fine. Keller additionally drew for the publisher Fiction House, including the feature "Suicide Smith" in the aviation-themed Wings Comics. '' #92 In 1950, Keller became a staff artist at Atlas, publisher Martin Goodman's 1950s predecessor to Marvel Comics. The dependable, unflashy Keller drew Western, horror and, working with writer Carl Wessler, crime stories.
Keller began his long association with Kid Colt in Kid Colt, Outlaw #25. He stayed with the character for at least a dozen years in that signature title, as well as in such anthology series as All Western Winners, Two-Gun Western and Gunsmoke Western. In 1955, Keller also began freelancing for the low-budget Charlton Comics, based in Derby, Connecticut, drawing Western and war stories for titles including Billy the Kid, Cheyenne Kid, Battlefield Action, Fightin' Air Force, Fightin' Army, Fightin' Marines and Submarine Attack. Following the near-demise of Atlas' comic-book line in 1957, and the accompanying cutbacks and firings, Keller supplemented his income by working in a car dealership in his home town. Within two years, he would be back freelancing for Atlas / Marvel. By this time, Keller was also indulging his love of race cars and model cars by writing and drawing such Charlton comics as Grand Prix, Hot Rod Racers, Hot Rods and Racing Cars, Teenage Hotrodders, Drag 'n' Wheels, Surf 'n' Wheels and World of Wheels. He stopped drawing for Marvel Comics by 1967, when Kid Colt, Outlaw had become mostly reprints, then drew a small number of stories for DC Comics from 1968 to 1971, including for the licensed toy-car comic Hot Wheels. He also continued to draw for Charlton, where his last known comics work was the cover and the accompanying eight-page story "The Rescuers" in the combat title Attack #14. Comics writer and historian Tony Isabella wrote that Keller
Later career and death
Keller returned to selling cars at Marshall Chevrolet in Reading, Pennsylvania and later was a part-time salesperson for Fun Stuff Hobbies and for Kiddie Kar Kollectibles. Keller died at St. Joe's Hospital in Reading, age 80, on January 2, 2003. He was buried at Forest Hills cemetery in Reiffton, Pennsylvania, and was survived by sons Richard and Robert, and by a sister, Vivian Riegel.
