As far as I was always concerned, a proper producer ie Rick Rubin, Ross Robinson, Butch Vig etc takes the songs a band writes and makes little tweaks and changes to the songs to make them as good as they can be. The producer essentially becomes a member of the band for a few months. One of the best examples of this is the demo version of Blind by Korn and the album version - there's huge sections of that song taken out. THAT is producing in my mind, along with helping the band get guitar sounds etc. They help craft the band and the bands path for the next couple of years until they record their next album, basically. People like Captain Tom or Mark Nicol, 95% of the time they get a band in, they set the mics up, get the sound the band wants and then presses record and that's pretty much it. A few helpful hints along the way to make it sound better but on the whole, no producing - in my mind that is. (In case he's reading this, I would say Mark TOTALLY produced the pisscranes track I recorded for the Fudge Xmas CD cos there were certainly aspects of that I didn't have a scooby what I wanted to do or what I should do or how to even pull it off so that track is DEFO produced by Mark!) So, rather than asking who the best producer is or whatever, you should really be asking who the best person is to RECORD your music is unless you're willing to spend a good few months and a fair bit of money making demos and re-recording songs over and over until it's perfick. If anyone can correct my views of what a producer does, feel free, that's all just come from slightly-educated guesses.