Darren McGavin did many things; check www.imdb.com and search for his name. My first intro to him was watching "The Night Stalker" on Friday nights. I LOVED that show (and the cool opening music, beginning with the whistling).
It was a great moment on "The X-Files" when Fox Mulder tracks down an old retired agent who had been in an early version of the FBI's X-Files division, and it turns out to be a curmudgeonly Darren McGavin!
Re: "Tribes" and the "Native American" theme--I found myself thinking the same thing; it might be because, when JMV's character used meditation to endure the hardships of boot camp, there was a background score suggestive of Native American music.