I'll add in a few:
Amarillo by Morning
I walk the Line
Mama Tried
Forever and Ever Amen
Gentle On My Mind
Your Cheatin' Heart
Some that probably aren't greatest, but they are fun
You Never Even Called Me By My Name
Don't Rock The Juke Box
Don't Come Home A Drinkin' with Lovin' on Your Mind
Boot Scootin Boogie
Lovesick Blues