Dak'kon, Fall-From-Grace, Annah, and Nordom from Planescape: Torment. And Kim Kitsuragi from Disco Elysium.
No love for Morte? D:
Oh shit I forgot Morte somehow! I feel bad now, Morte is awesome. Of course Morte goes on the list.
Some other ones I liked would be:
- Rhin, Erritis, and Matkina from Tides of Numenera
- Verse, Lantry, and Sirin from Tyranny
- Eder, Grieving Mother, and Devil of Caroc from Pillars of Eternity
- Linzi, Ekundayo, and Amiri from Kingmaker
- Imoen, Minsc, and Viconia from Baldur's Gate
- Mazzy Fentan from Baldur's Gate 2
- Racter and Gaichu (and of course Gobbet as mentioned before) from Shadowrun: Hong Kong
- Khelgar Ironfist from Neverwinter Nights 2
- Kaelyn the Dove and Okku from Mask of the Betrayer
- Parvati and Vicar Max from The Outer Worlds
- Alistair, Oghren, Sten, Shale, and Leliana (and the dog) from Dragon Age Origins
- Stephen Heck (kinda a companion) from Alpha Protocol
- Amadea and Kalden from Masquerada: Songs and Shadows
And that's all I can think of off the top of my head.