George Martin did produce other bands.
http://en.wikipedia.org/wiki/George_Martin ...
I don't think he's really the best producer. Really, really good ... yes. I think that because he's associated with the Beatles that people tend to put him on a pedastal. Again, I'm not knocking the guy ... there's no doubt that he is brilliant and we wouldn't have a lot of the music we have today if it weren't for him working with the Beatles.