What's the best RPG from a western dev?

I have never been a fan of traditional hardcore RPGs that are too deep rooted in stats and and other bullshit. I absolutely despise any turn based garbage too. So, I tend to be drawn to games that are more action/adventure with RPG elements. Games like The Witcher 3, Mass Effect series, Skyrim, Fable, Zelda, Assasin's Creed, Horizon, Dark Souls, etc. are what I like. That being said... The Witcher 3 is my favourite.

Correct, sometimes less is indeed more. Mechanically Super Mario Odyssey actually wrecked SM64. But SM64, due to having 120 stars as opposed to 800, ended up arguably being the better game.

As a software developer. Feature creep is an issue that we face in our business.

Yup. Even though controlling Mario was a joy in Odyssey, I'd play Mario 64 over it any day. Or Sunshine. Tried replaying Odyssey more than once, but stopped everytime because of boredom. Compare that to Mario 64, which I've 100%-ed many times.

Mass Effects.

Disco Elysium was a revolution in narrative design and took this genre to another level, but besides that:

Pathfinder: Wrath of the Righteous (Turn-Based & Real Time)

Pathfinder: Kingmaker (Turn-Based & Real Time)

Pillars of Eternity

Pillars of Eternity II: Deadfire

Baldur's Gate III (Turn-Based)

Divinity: Original Sin II (Turn-Based)

Tyranny

Atom RPG

Wasteland 3 (It's not the best RPG but I had a lot of fun, playing it)

Pentiment (on my wishlist, also on Game Pass)

Fallout: New Vegas

Kotor, Jade Empire and Dragon Age.

TES IV Oblivion back when Bethesda was good.

Mass Effect 2 back when Bioware was good.

The Witcher 3 back when CDPR was good.

Diablo 2 back when Blizzard North was good

But the best RPGs are made by the Japanese.

Elden Ring, FFX, FF7.