Ruston Kelly and Kacey Musgraves

Marrying the hardscrabble poetry of alt-country troubadours with the moodiness of alternative singer/songwriters, Ruston Kelly cut a unique figure in Nashville at the tail end of the 2010s. His relationship with Kacey Musgraves -- the pair met at the Bluebird Café in 2016 and married the following year -- may have earned him some headlines, but he built his reputation as a songwriter, writing "Nashville Without You" for Tim McGraw in 2013. As a performer, he moved toward the fringes of mainstream country, a shift notable on his 2017 debut EP, Halloween, and its 2018 full-lengt...