Fair enough - from that 60's and 70's I remember many artists like Country Charlie Pride, Buck Owens, Merle Haggard, Loretta Lynn, Tammy Wynette, Ray Price, Dolly Parton and early Kenny Rogers and Glen Campbell (who was a sideman for many bands before going solo.) Prior to that time I heard a bit more gospel on country stations,
Late in the 70's there was a "trucker/CB" thread in country music; Jerry Reed had a big couple of hits in that genre especially because of the movie Smokey and The Bandit. Curless was indeed a minor figure in country music, he just happened to tap into that market a few years earlier.