Suggestions by @michaelflores1

Spencer Charnas

as Moloch in Godzilla in Hell

Redmoon

as Red Moon in Godzilla in Hell

Sea Serpent

as Scorched Serpent in Godzilla in Hell

Brad Dourif

as Plutus in Godzilla in Hell

Frank Welker

as Beelzebub in Godzilla in Hell

Cerberus

as Cerberus in Godzilla in Hell

Jamie Campbell Bower

as Minos in Godzilla in Hell

Jeremy Irons

as Charon in Godzilla in Hell

Ghost Godzilla

as Ghost Godzilla in Godzilla in Hell

Anguirus (Angirasu)

as Anguirus in Godzilla in Hell

Varan (Varan)

as Varan in Godzilla in Hell

Lucy Liu

as Lillith in Godzilla in Hell

Dave Grohl

as Satan in Godzilla in Hell

Tiamat

as Tiamat in Godzilla II: King of the Monsters

Ari Aster

as Director in Godzilla in Hell

Hideaki Anno

as Producer in Godzilla in Hell

Stephen King

as Writer in Godzilla in Hell

The Newton Brothers

as Composer in Godzilla in Hell

Godzilla (Monsterverse)

as Godzilla in Godzilla in Hell

Gedde Watanabe

as Mysterian Lieutenant in Godzilla x Kong: Horror of Mechagodzilla