[Myrkul]

This might be a bit early as the soundtrack is still not available on digital stores (should not be very long though).

Informations comes from the sountrack released for owners of the Collector's Edition version of the game.
The commercial release could be different.

The "Heavy Metal Choir" can be heard here and there, but mostly on the track Gladiator Boss (Kar En Tuk !)
(also RIP Nature Ganganbaigal).

Bobby Prince is credited for the track DOOM Eternal which is kinda a remix of DOOM II track Opening to Hell.