I always felt Roy was a sensitive, very talented musician, who somewhere around the late sixties or early seventies got swamped by the Corries phenominon.
During the sixties the Corries were much more involved with the revival and other bands, in fact Robin Willianson, (no relation), of the Incredible String Band was a good fried of Roy's, and the Corries recorded a couple of ISB's songs.
From the seventies Ronnie's showmanship and business sense were the driving force behind the Corries, but without Roy's skills they would never have been so big, so I guess they were a perfect match. Yin and yang, if you like.
Listen to the way Roy originally recorded "Flower of Scotland" - a lament sung with early cittern like instumental backing, not the racist anthem it was to become.
He was one of nature's gentlemen,
love, john.