Hands down EA .
Nothing comes even close .
Ubisoft is honestly the best of the "evil AAA publishers"...they aren´t particularly great, but they publish some fine games along the way (in contrast to say EA and Activision, barely working junk of Software)
Edit: And Capcom, for all their shitty DLC practices and what have you are capable of developing great handheld games (Ace Attorney, Monster Hunter, RE: Revelations etc)
....im almost inclined to add Square Enix to the top three of shitty publishers