Country What Country Musicians Sing The Best Songs About Heartache?

What country musicians sing the best songs about heartache? - country

I only have two CDs of country music, Dixie Chicks and Carrie Underwood. I have the first CD from Carrie & Dixie Chicks' last. Would one of his other CDs or other artists, but especially those who sing very well the fear and loneliness? Groups, male and female singers? Which CD? I do not like twangy country. I love the country, with good music, not just a tool. Thank you!