Richard Thompson has a perfectly beautiful and spine-tingling solo on "Just As the Tide Was Flowing". (Maddy Prior on vocals with some incarnation of the Albion Country Band - I used to have it on an LP called "The Antilles Sampler").

Also, Ry Cooder's heart-wringingly soulful slide solo on his own version of "Across the Borderline" from the "Get Rhythm" album.