And I've just had in mind: Torben Schmidt! Very often associated with Alfred Gregl and though he also produced some craps (also some of his prods are unknown to me...) I think he's got his place as a good producer: File-O-Fax, Aqualite, Next Fashion, Microlab, Omnicron and so on...a bit less known than guys like Nostrum or Gary D. but worth too IMO