Stealth game recommendations?

My Dad is nearing retirement and I want to get him a console - he bought an Xbox with Splinter Cell when I was young that immediately became my Xbox.

I think he'd like games that are:

• Fairly slow-paced: he doesn't have the muscle memory for a fast action game, so stealth would probably suit him.

• Grounded settings: I think a fantasy setting might put him off a bit.

The only stealth games I remember getting into are Dishonoured and Crysis 2. I've heard good things about Thief but never picked it up. Any recs would be great 👍