For those with a fable to "country" I can recomend
Sweet Dreams
Patsy Cline - Crazy
Patsy Cline
Singles
1957 - Walking After Midnight
1961 - I Fall To Pieces
1961 - Crazy / Who Can I Count On
1962 - She's Got You
1962 - Imagine That / When I Get Thru With You
1962 - So Wrong / You're Stronger Than Me
1963 - Back In Baby's Arms
1963 - Leaving On Your Mind
1963 - Sweet Dreams of You
Albums
1957 - Patsy Cline (Decca)
1961 - Patsy Cline Showcase (Decca)
1962 - Sentimentally Yours (Decca)
1963 - The Patsy Cline Story (Decca)
1964 - A Tribute To Patsy Cline (Decca)
1964 - Portrait Of Patsy Cline (Decca)
1964 - That's How A Heartache Begins (Decca)
1967 - Patsy Cline's Greatest Hits (Decca)
1980 - Always (MCA)
1980 - The Last Sessions (MCA)
1985 - Sweet Dreams, The Life And Time Of Patsy Cline (MCA)
1985 - Today, Tomorrow And Forever (MCA)
1986 - 12 Greatest Hits (MCA)
1988 - Live At The Opry (MCA)
1991 - The Patsy Cline Collection (MCA)
1999 - Classic Patsy Cline: 20th Century (MCA)
2002 - Songs Of Love
Willie Nelson is great as well. But hes more a 60s singer, though he released some stuff in the late 50s.
I am sure someone mentioned Johnny Cash already as well. For the case not:
Johnny Cash "I Walk the Line" live 1959