This is of course mood dependent, but
Mark Knopfler and Emmylou Harris, Tracey Chapman, Warren Zevon (especially Excitable Boy, 'Roland the Headless Thompson Gunner' is a fav), Beatles, Bonnie Raitt, Black Sabbath, Chris Rhea, Collective Soul, Glenn Miller, Annie Lennox, Uriah Heep, to name what comes to mind...