Hello Murray:

There's a forum called "The Range Place" where you can search for such things.

FOR JOHN DENVER

http://therangeplace.forummotions.com/t830-john-denver

Not counting the falsetto. You can find the following on YouTube:

1973 "John Denver and Paul Williams Drift Away" a sweet C5
1982 performance of "Eagle and Hawk" twice reaching B
1969 "Civil War Medley" for Bb - two steps higher than Bob Gibson's original
Any performance of "Eagle and Hawk" the first verse is A throughout

But two of his collaborators would kill him when it comes to high notes: Placido Domingo and Alexander Gradsky. With these two he only sang low harmony.

FOR PHIL OCHS

http://therangeplace.boards.net/thread/170/phil-ochs

I remember him reaching A on "Tape of California", the second bridge "The scene is coming soon".

FOR ME

I have no trouble singing any John Denver song