cool topic: I hadn't listened to Harmony since last Masssy stint but I'll go with:
Clouds Of Loneliness, Couchiching, Sometimes I Wish (I think this is really cool prod work, under the circumstances, by Bob Doidge...the whole feel of the chorus always brings me warmth, yet a shiver)
I echo Winter Claw with his/her comment regarding my middle tune pick but, IMO, seeing Gord have such fun singing this live and the audience having even more fun listening steps it up several notches