Generally the Doug Sax masters are in the top quartile (he has a huge list of credits on Artists Direct).
Other good engineers
Bill Schnee
Chuck Ainslay
Al Schmitt
Alan Parsons
James Guthrie
Mark Bishop
George Massenburg
Ed Cherney
Elliot Schiener
There are plenty of others of course but the above list probably accounts for more than 2/3 of the mainstream grammy award winning productions from big names.
Other good engineers
Bill Schnee
Chuck Ainslay
Al Schmitt
Alan Parsons
James Guthrie
Mark Bishop
George Massenburg
Ed Cherney
Elliot Schiener
There are plenty of others of course but the above list probably accounts for more than 2/3 of the mainstream grammy award winning productions from big names.