Ok, my "folkies who start with f" playlist somehow led to hearing for the first time musicians Bert Jansch and John
Renbossurn Renbourn playing Charles Mingus' Goodbye Pork Pie Hat. Not as soulful as the original rendition, it has intensity and depth nonetheless, in a repressed kind of way. emusic has a clip.
Here's a list of artists who have recorded the tune:
Karrin Allyson; Jeff Beck; Jay Beckenstein; Harry Beckett; Bill Holman Big Band; Carla Bley; Johanne Blouin; Hamiet Bluiett; Anthony Braxton; Pam Bricker; Matthew Brubeck; Tony Campise; Eugene Chadbourne; Stanley Clarke; Jerome Cooper; Dave Corbus; Larry Coryell; Claire Daly; Dead Cat Bounce; Alex DeGrassi; Klaus Doldinger; Dominic Duval; East Of Eden; Taylor Eigsti; Nine Ensemble; Gil Evans; Art Farmer; Carl Filipiak; Paolo Fresu; Frontier Traffic; Richard Greene; GRP All Star Big Band; Jerry Hahn; Alex Harding; Henrys; Bill Holman; D.D. Jackson; Bert Jansch; Jazz Workshop; Bob Jordan; Uwe Kropinski; Steve Lacy; Oliver Lake; Victor Magnani; Marga; Dave Martone; Bill Mays; John McLaughlin; Tony McManus; Charles McPherson; Marcus Miller; Mingus Big Band; Mingus Dynasty; Charles Mingus; Joni Mitchell; Motus Quartett; George Mraz; Mark Murphy; Nashville Mandolin; Tim Newman; One (Jazz); Padovani / Cormann; Horace Parlan; Pentangle; Michel Portal; Tony Reedus; John Renbourn; Maurizio Rolli; Furio Romano; Ian Shaw; Derek Sherinian; Andy Summers; Eva Suobodova; Aki Takase; Tiziano Tononi; Ralph Towner; Uzeb; Carl Verheyen; Shawn Wallace; Bill Warfield; Ernie Watts; Michael Wolff; Denny Zeitlin.
Andy Summers is the Police guitarist, right? God forbid Sting sings the Joni Mitchell lyrics.