2018-09-04 14:16:20 UTC
The Rockford Files (1974-1980) with 124 episodes and 8 TV films ( 1994-1999)
Magnum PI (1980-1988)
Both were Private Investigators, rather than police like Kojak and Columbo
I may be wrong but wasn't Rockford formally a detective before he was a private investigator, one of his friends is a detective.
I think Magnum Pi replaced The Rockford Files as Rockford ended the same year Magnum started, though it was mainly because James Garner kept hurting himself as he did all stunts himself.