Here's one you wouldn't expect to be included in this category.
However, I make the case that this song, while considered rock and roll in its day, actually was a unique representation of country music.
Recorded when Don was age 20, and Phil was age 18 (as they tell us in this video), the song was written by a well-known songwriting team, Felice and Boudleaux Bryant, who were very prolific and successful songwriters, back in an age when the lines between country and rockabilly were blurred.
This songwriting team was responsible for songs such as, "Wake Up Little Susie", "All I Have To Do Is Dream", "Love Hurts", "Rocky Top", "Raining In My Heart" (recorded by Buddy Holly), among many other classic songs.
These songs, if released as records today, would be classified as country songs.
Therefore, I place "Bye Bye Love" in my Top 20 of the Best Country Songs Of All Time.
(Plus, it holds kind of special memories for me, but be that as it may.....)