Bethesda is probably the best possible publisher for Xbox to have acquired, if we are talking alignment with my tastes.
The XGS lineup for the next several years could look like the following:
2021: Halo Infinite, Forza Motorsport, Everwild
2022: Starfield, Forza Horizon, Age of Empires 4,
2023: Avowed, Hellblade 2, Doom 3, Gears 6, Fable
2024: Perfect Dark, The Elder Scrolls VI, Fallout New Vegas 2,
and those are just a collection of the titles that we have good reason to suspect for release!
Not to sell the Playstation Studios lineup short, though - I am incredibly excited to see what Naughty Dog + Insomniac will do next, and I really need to get around to playing GOW and Horizon. Outside of those franchises, I am a bit more indifferent to the rest of the studio landscape - so this is an easy vote for XGS.