Like some of the others here, my tops include:
APM (Bruton, KPM, Themes International, Omnimusic, et al.)
Keith Mansfield
Alan Hawkshaw
Irving Martin and Brian Dee
Johnny Pearson
David Lindup
Ray Russell
Syd Dale
Duncan Lamont
Brian Bennett
John Cameron
Trevor and Geoff Bastow
Richard Hill
Zack Laurence
Neil Richardson
Patrick Wilson
Frank Ricotti
John Scott
Adrian Baker
Paul Keogh
Dick Walter
Harold Fisher
Tony Hymas
Mike Moran
Dave Hewson and Pete Morris
Francis Monkman
Cliff Hall
Steve Gray
Brian Wade
John Fiddy
David Snell
Clive Hicks
Mike Vickers
Dave Richmond
Alan Parker
Van Phillips
Tony Kinsey
Harold Smart
Paul Martin
Jack Dorsey
Max Harris
Ken Moule
Andrew Jackman
W. Merrick Farran
John Shakespeare
Paddy Kingsland
Tony Hiller
Gal Galbraith
Sam Sklair
Doug Wood
Mark Styles
Ed Kosowski
Haim Cotton
John Manchester
UPM (Network Music, Killer Tracks, et al.)
Craig Palmer
Larry Owens
Bill Cantos
Jonathan Merrill
Stefan Olesten
Dennis Woodrich
Clark Gault
John Hobbs
Brian Bliss
Grant Geissman
Steve Kujala
Lars Clutterham
Rick Braun
Al Capps
Larry Groupé
Larry Wolff
BMG (Valentino, Parry, Big Score)
Michael Reynolds
Irving Fields
Bill Potts
Jean Dalia
Samuel Spence
George Kleinsinger
Bob Donovan
Eugene Bianco
Richard Sanders
Joey Carbone
Paul Zaza
Bill Brohn
Dom Massaro
George Chase
Walter Murphy
Louise Messina and William Bingham
de Wolfe
Roger Webb
Sir Karl Jenkins
Graham Todd
Reg Tilsley
Brian Alberici and Andrew May
WCPM (Gari, Ole Georg, Capitol, et al.)
Frank Gari
Ole Georg
Henrik Nielsen
Robert Ascot
Manfred Minnich
Dan Kirsten
Tom Elliot
Jack Arel and Jean-Claude Petit