The Telescoper has a link to a short YouTube clip of the original and excellent version of The Unchained Melody (subsequently made famous by the Righteous Brothers), which led me to a slightly less conventional version:

And at the suggested links at the end of that I was taken to guitarist Pierre Bensusan:

And while I was browsing guitarists, this from The Little Unsaid caught my attention:

Listening to the Pierre Bensusan tracks, I wondered if he had ever played with John Renbourn.  It seems he has, and that Renbourn (and Bert Jansch) were some of his earliest influences:

Interview Double Bill Concert with John Renbourn (2002)