Photo of Guy and Susanna Clark in Nashville by Jim McGuire, 1975. 

I think my new all-time favorite couple might be Guy Clark and his late wife Susanna. Both of them Texans who became mainstays of the Nashville music scene in the 70s, the Clarks seemed to have a Johnny and June thing going on with the addition of Townes Van Zandt as a third wheel (this clip from Be Here to Love Me: A Film About Townes Van Zandt pretty much says it all). Susanna Clark not only wrote songs that were covered by greats like Rosanne Cash and Emmylou Harris, but she also was a revered painter, providing cover art for several albums, such as Willie Nelson's 1978 Stardust.