Platinum Games is in charge of the combat system, Square Enix for the rest and as the publisher.
Free Step Dodge
Tyaren
UpSideDownGRUNT
Yes, platinum also did Bayonetta
DestructionBomb
Platinum Games was also the group that made Devil May Cry 1 when they were still under Capcom with Kamiya.
Darkslay
More importantly, they're also responsible for Viewtiful Joe, Okami, and the best game ever, God Hand. That was back when they were known as Clover Studio.
Hazard
Can't forget Vanquish