First of all, Denver had a "voice". Tom Paxton once said that he wished he could sing his own songs like John Denver did. It's too easy to write off John as some middle-of-the-road feather-weight. He wasn't. There is room for all sorts of music in this world of ours. For example, Troll's list of performers worth listening to is simply his choice - the things that move him. The older I get the more a understand that we all hear things differently, and that there is no "best". Miles Davis may be hailed as a genius by some, but to others his music will not move them an inch - in fact, it may irritate them greatly. And exactly the same argument could embrace Roy Harper's work.