Notable as a singer and pianist for the Southern Gospel group the Cathedral Quartet, he is also remembered for his work with the Foggy River Boys and the Weatherfords.
In 1963, he formed the Cathedral Quartet at Ohio's Cathedral of Tomorrow along with fellow singers Glen Payne and Bobby Clark.
For a time, he owned a Las Vegas-based TV station.
Born in Detroit, Michigan, to Yugoslavian parents, he later lived in Nevada, Ohio, and Florida. His son, Danny "The Count" Koker, became the star of the History channel reality series Counting Cars.
He and George Younce were both members of the Cathedral Quartet.
