Sony = Naughty Dogs.
Nintendo = Game Freak (Pokemon).
Microsoft = I don't know, RARE maybe ? But purchased Halo I.P was a great idea :). The game is huge.
Off topic:
Sony own a lot of great studios though, like SCE Japan Studios, the studios that made/making Shadow of Collossus, Gravity Rush, thelastguardian, ICO, Demon's Soul & Bloodborne (co-produce with FromSoftware) or Sucker Punch with their inFAMOUS and Sly Cooper, but my personal favorite is Media Molecule, the creator of little big planet, Tereaway and of course DREAM.
Polyphony (gran turismo) is pretty decent as well.








