Onhwy61: I can't say I know anything about them as people -- I normally don't read music biographies and such -- but I would never have considered these relatively well-known producers to be merely "footnotes" in recorded music history. However, it's true that most producers are never considered "stars" in their own right, exceptions like Sam Phillips, Mike Lieber and Jerry Stoller, Phil Spector, and George Martin notwithstanding.
BTW, my original gatefold copy of the first VU LP (non-peelable banana) says "Produced by Andy Warhol" right on the back cover and spine in the same type-size as the band name, which was of course mostly a conceit, but Tom Wilson is specifically credited with producing only one cut, "Sunday Morning", and with supervision of editing and remixing done by others. And the director of engineering, Val Valentin, is another one of your unsung ubiquitous guys.
BTW, my original gatefold copy of the first VU LP (non-peelable banana) says "Produced by Andy Warhol" right on the back cover and spine in the same type-size as the band name, which was of course mostly a conceit, but Tom Wilson is specifically credited with producing only one cut, "Sunday Morning", and with supervision of editing and remixing done by others. And the director of engineering, Val Valentin, is another one of your unsung ubiquitous guys.