I don’t remember the actors names but here are characters and the games whose voice acting left an impression on me:

• Alistair and Morrigan from Dragon Age Origins
• Both leads from Firewatch
• Lee from Telltale’s Walking Dead Season 1
• Most of the main characters from Red Dead Redemption 1 and 2
• The voices from Hellblade Senua’s Sacrifice
• Astarion from Baldurs Gate 3 was head and shoulders above the rest, although the narrator was also very good
• Troy Baker knocked it out of the park as Indians Jones in the great circle
• All of the Uncharted games have fantastic voice acting. Nolan North was born to play Nathan Drake
• Similarly, the voice acting in The Last of Us is fantastic
• In the mass effect OT, special callout to Jennifer Hlae and Mark Meer (the latter especially grew into the role in the second and third game) and also to the actors who voices Garrus and Tali.