I can see the argument against Project Pat, that one, I admit probably shouldn't be on the list. I cannot budge with eminem though- his voice makes my ears bleed and I cannot understand how anyone can honestly think his voice/style/flow whatever is pleasing to ones ears. It's like listening to a cat in heat.
Heavy D, yeah he an OG but that shouldn't give him a pass for making shitty music. I mean, The Fat Boys are OG's too but I wouldn't hesitate to say they made some pretty awful music, cool/fun gimmick for the times no doubt, but music wise, nah.
I've never owned a Ludacris CD, nor heard one all the way through, I can only comment on the shit I've heard (radio, BET/MTV, clubs/parties, etc.) and that shit is horrible.