Teddy riley by a mile. Quincy gets way too much credit. He was very usefull on off the wall, but thats pretty much it. Thriller credit should be given to michael, rod temperton and bruce sweedien Michael wrote like nearlly all the songs on bad, and worked with a few outside writers. Teddy came in straight away with some demos that made nearly half of dangerous, Quincy is really showing all his genius nowadays isnt he, whats he done since michael, hmmm practically nothing and failed on countless solo album attempts............