The Haden Triplets - Single Girl

This is a big part of what I've been listening to lately.

Randy Newman - Losing You

Nick Lowe - Raining Raining

The Doors - Break OnThrough

First song on their first album.

Aram Khachaturian - Adagio from the Gayane Ballet Suite

The musicians aren't credited for this version, but they obviously know what they're doing. This piece was used very effectively in 2001: A Space Odyssey.

James Taylor - Fire And Rain

I've posted this before and may again. It's a song about loss and pain, but is so smooth that it's easy to miss that.

Elvis Presley - Trouble