Before he was The Scarecrow in Scarecrow and Mrs. King (1983) Bruce Boxleitner played real life game hunter Frank Buck in this adventure series designed to capitalize on the success of Radars of the Lost Ark. Buck was a sensation in the early 20th century as a big game trapper and conservationist who wrote the book this series, and a film in 1932 was named after. Set in 1930's Malaya, the real-life history of Buck has been embellished to make him a matinee idol who defeats bad guys in each hour long episode.
The series has never made it to DVD. You can find full episodes on YouTube, however. Above is the second episode to air - The Seven Keys to Singapore, uploaded by MrDougwarner69.
Obscurity factor: 8 (rarely heard from since it first aired, not on DVD, available on YouTube)