Porter Wagoner certainly had a darker side. The 'Thin Man from West Plains' wasn't always the grand showman (with rhinestone suits and a pompadour) that he appeared. He had his demons and spent some time in Parkview psychiatric hospital.
He was one of the most significant figures in post Hank Williams Country Music. Unlike say Conway Twitty or George Jones, Porter wasn't a great singer. He had a rich baritone voice albeit with little range, but he made up for his limitations by investing his records with total sincerity.
Few performers, if any, could create such macabre and menacing country music as Porter Wagoner. 'The Rubber Room' album is a perfect example, the title track is perfectly disturbing, and the album as a whole is a classic.