Oh so many! Hank Williams has a few contenders, Cold Cold heart, I'm so Lonesome, Your cheatin Heart. Willie Nelson's, Crazy deserves a mention too. My personal favourite to sing is, Blue Side Of Lonesome,George Jones version, written by Leon Payne, a blind fiddler who also wrote the Jim Reeves htt, I Love you Because, I'll leave it at that or I'll go into hundreds of others