Another responded "Yeah, and he has only one singer too" (which was Michael Jackson).
Look, no one is beyond criticism and everyboy ain't perfect ~ but mygosh did those two guys reel in the dough ~ and they made it look like fun too.
Did your co-worker win their musicologist degree in a poker game?
Rather than listing the guys entire resume, I suggest you look up Quincy Jones on Wikipedia.
Wrote, arranged, produced, performed with/for Frank Sinatra, Ellah Fitzgerald, Miles Davis, Steven Spielberg, Dean Martin, Sammy Davis Jr., Duke Ellington, Ray Charles, on and on etc...
The songs “Just Once” and “One Hundred Ways”, songs sung by James Ingram, were from a Quincy Jones album that included several other well known singers. (Unusual in that the producer got top billing, rather than the "performers".)
Jones was largely responsible for the majority of Michaels post Jackson5 success, but for Quincy, MJ was barely a blip on his careers radar screen.
BTW...Quincy Jones is the producer for a TV show that is responsible for some of the best music video parodies ever made...MADTV.