In this order for me:
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Capcom
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Squaresoft (Enix)
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Konami
The big three I had in my regular playing rotation growing up. And while over the years all three have fell off in various ways from their golden age of gaming status, I still keep coming back to them.
Biohazard, Final Fantasy, Castlevania, shame though that Castlevania is dead in the water, save for a good anime adaption.
McMillen genuinely interacting with the Isaac community and developing the game around their feedback when I was playing was so dope. I know he's obviously antitheist but I always wondered if he was a comrade for some reason.