Try to make it a regular album-sized list (about 14 songs). I'll start with a few...
Ernie:
Rubber Duckie
High Middle Low
Everybody Wash
One and One Make Two
Feeling Good, Feeling Bad
The Incects in You Neighborhood
Imagination
One Fine Face
Dee Dee Dee
Do De Rubber Duck
Would You Like to Buy an O?
Do You Like Me?
I Don't Want to Live on the Moon
Ernie:
Rubber Duckie
High Middle Low
Everybody Wash
One and One Make Two
Feeling Good, Feeling Bad
The Incects in You Neighborhood
Imagination
One Fine Face
Dee Dee Dee
Do De Rubber Duck
Would You Like to Buy an O?
Do You Like Me?
I Don't Want to Live on the Moon