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.
FromSoftware because if Dark Souls 2 is your worst game (by popular opinion) in the last 15 years you're doing a good job. Sekiro is also my favourite combat system in any game.
Remedy, I love their use of mixed mediums with FMV scenes like Dr. Darling's tapes in Control. Alan Wake 2 is also a masterpiece of a game and I love how far they push what they are able to do in each game.
Paradox because no one does map game and number go up like they do. Victoria 2 is the first game I played from them and I've played everything since (the only map game I don't like is HOI4)
Honourable mention to Grasshopper Manufacture for being weird and fun