MJ needed a Cat like Q mainly to put out the right type of songs and not just anything. a Cat like MJ is a Incredible talent, however with just anybody as a Producer you don't get all that out of him and what Q was able to do and challenge him.

Rod Temperton is a Badd Cat, however he needed an MJ to take his songs even further and it was accomplished ten fold.

you gotta have the songs to match the talent and everything else will fall into line