What am I missing? Americana?

Great to see recommendations for Richard Buckner and Jeffrey Foucault! Both brilliant songwriters and Foccault is great on guitar. I heartily agree!

A few more in that come to mind:

Will Oldham (Bonnie "Prince" Billy / Palace Brothers / Palace Music)
16 Horsepower
Gillian Welch
Mary Gauthier
Chris Whitley
Vic Chestnut

Notec,
You know that Whiskeytown was Ryan Adam's band right?

Muzikat - yes I did. The big difference being - in whiskeytown adams was not only songwriter; Caitlan Cary and Phil Wandscher co-wrote.

Bottle Rockets
Silos
Woven Hand
Alejandro Escovedo (solo, and his 80s band Rank and File)
Handsome Family
Neko Case
Lucinda Williams (who rules in this here kingdom)
The Blasters
John Prine
James McMurtry
Townes Van Zandt
Drive-by Truckers
Trailer Bride
Old 97s

Grandpaboy