King elected to stay behind in Louisville, and played with the Log Cabin Boys in 1935; the following year, he formed his own band, the Golden West Cowboys, which initially featured fiddler Abner Sims, guitarist Curly Rhodes, and singer Texas Daisy. In 1937, fiddler Redd Stewart joined the lineup, and would later become King's songwriting partner. Just as importantly, the group was invited to join the Grand Ole Opry. They were an unorthodox selection that made traditionalists uncomfortable, not just for their wardrobe, but also for their flashy, professional showmanship and for the polka and waltz rhythms that drove some of their songs. They remained regulars over the next ten years, during which time King also hosted his own radio show in Knoxville; they also evolved into more of a Western swing band. King first used an amplified electric guitar on-stage at the Opry in 1940, and introduced drums to the Opry stage in 1947. During that run, several prominent vocalists passed through the ranks of the Golden West Cowboys, including Eddy Arnold, Cowboy Copas, Milton Estes, Tommy Sosebee, and Becky Barfield. The Golden West Cowboys recorded and toured as Minnie Pearl's backing band in 1941 and 1942, and worked with Ernest Tubb as well. Additionally, King appeared in several Westerns playing himself as a bandleader; the first was 1938's Gold Mine in the Sky, starring his old friend Gene Autry.
A new era for the band started in 1947. King left the Grand Ole Opry to return to Louisville and host his own TV show, which ran for the next ten years and was picked up nationally by ABC in the final two seasons. King also signed a recording contract with RCA, and Redd Stewart took over the lead vocal chores. Inspired by Bill Monroe's hit "Kentucky Waltz," King and Stewart penned lyrics to an instrumental tune they'd been playing; recorded in December 1947, "Tennessee Waltz" became a number three hit for King the following year. Pop singer Patti Page cut her own version in 1950 and it was an enormous hit, topping the pop charts and selling several million copies; it ranked as one of the biggest country crossovers ever. King followed it in 1951 with "Slow Poke," a novelty tune that topped both the country and pop charts, spending over three months at number one. Other hit King compositions included "Silver and Gold" (1952), "Changing Partners" (1954), "Bonaparte's Retreat," "You Belong to Me," "Walk by the River," "Busybody," and "Bimbo," among others. King also returned to the movies, appearing in a couple of Charles Starrett Westerns during the early '50s.
King's run of commercial success tailed off after 1954; his TV show went off the air in 1957, and he continued to record for RCA until 1959. From then until 1963, he reunited with Minnie Pearl and led the Golden West Cowboys as her supporting band. In 1965, Tennessee adopted "Tennessee Waltz" as its official state song. King broke up the Golden West Cowboys in 1969 and went to work for the Country Music Foundation, at one point serving as its director. He was elected to the Country Music Hall of Fame in 1974, later serving on its board of directors, and also made it into the Nashville Songwriters Hall of Fame. King passed away in Louisville on March 7, 2000, after suffering a heart attack. ~ Steve Huey, Rovi