We've talked endlessly about great albums and classic songs by many different artists. However many artists have incredible depth and even their lesser-known and sometimes obscure songs can be amazing. So my suggestion is for you to compile an album's worth of songs (number may vary based on the length of the songs) by an artist composed of great songs that weren't singles, weren't radio hits, and would generally not be recognized by the casual music listener. Let's exclude Genesis from consideration as we've had plenty of discussion about their lesser-known gems.
I'll start us off. Here's my suggestion for a compilation by The Beatles:
This Boy
I'll Be Back
Bad Boy
I'm Down
I'm Looking Through You
If I Needed Someone
Rain
She Said She Said
The Inner Light
It's All Too Much
Hey Bulldog
Happiness Is a Warm Gun
Mother Nature's Son
Savoy Truffle
Two of Us
You'll note that it is mainly Lennon and Harrison songs. I think this is because Paul was so good at writing catchy material that more of his songs are fairly well known.