Jimmy Jam and Terry Lewis, are highly underrated producers.

SOS Band, Janet Jackson, Human League, Alexander O'neal, etc.

They have a definite sound to them, and know how to use a sample brilliantly. [America's 'Ventura Highway' on Janet's 'Someone To Call My Lover', for example.]

They even did the pduction on this little ditty:

Robert Palmer - Didn't Mean To Turn On