Hey Neil,
I was somewhat surprised to find that you have yet to do any song lessons by Elliott Smith! I think there would be a lot of value in taking a look at Whatever (Folk Song in C).
Elliott Smith's songs tend to be very difficult. He was really good at carrying melodies over complex chord arrangements (in my opinion). "Whatever" seems like a great starting point for someone looking to learn his music.
There are a few other Elliott Smith songs that you might find interesting.
Clementine
Angeles
Condor Ave (I've always been desperate to learn this one)
Somebody That I Used to Know
Okay, that's all for now. Thanks for your wonderful lessons!
-Thomas