French post-metal outfit Oorthian builds monolithic walls of sound that merge doom metal's crushing weight with post-metal's dynamic architecture. Their patient, crescendo-driven compositions unfold gradually, trading speed for overwhelming density and emotional catharsis.

Opera Diabolicus is a Swedish horror-themed metal project established in Gothenburg in the mid-2000s by David Grimore and Adrian de Crow, drawing from epic heavy metal, gothic doom, and symphonic progressive metal in the tradition of King Diamond and Therion. The band released three albums — a self-titled debut (2009), 1614 (2012), and Death on a Pale Horse (2021, via Season of Mist) — each built around theatrical narratives of vampires, witchcraft, and the black death, featuring guest contributions from musicians such as Mats Levén and Snowy Shaw. Their sound is ornate and deliberately cinematic, prioritizing atmosphere and narrative coherence over conventional metal structure.

Legendary Italian extreme metal band from Biella, Piedmont, with a history spanning multiple eras and stylistic phases from gothic/doom/death metal to symphonic black metal. Opera IX are among Italy's most internationally recognized extreme metal acts, with their theatrics and occult themes defining a uniquely Italian approach to the genre.

Greek act Ophidian merges black metal's cold atmospherics with doom metal's ponderous weight, creating a serpentine hybrid that coils between blast-driven aggression and slow, crushing heaviness. Their compositions inhabit a dark, oppressive sonic space.

German death/doom metal band from Hamburg, delivering crushing, slow-burning extremity since 2004. Named after the Greek word for snake, their two decades of oppressive death/doom mark them as Hamburg scene veterans.

Belgian stoner/doom metal band from Mechelen, delivering hazy, riff-drenched heaviness since 2017. Their narcotic name channels the intoxicating, mind-altering character of their stoner doom grooves.

Birmingham's Opium Lord crafts monolithic doom and sludge metal with a psychedelic edge, creating dense, hallucinatory compositions that move at glacial speeds. Their massive tone and hypnotic repetition evoke a drugged-out heaviness reminiscent of Eyehategod and Bongripper.

Czech psychedelic doom/sludge metal band from Prague, delivering mind-expanding heaviness since 2018. Self-described as 'psychedelic sludge from Prague,' their catalog including 'Godskin' and 'Black Veins Ritual' channels narcotic, hallucinatory darkness.

Barnaul melodic doom/death metal act from the Altai region of Siberia, active since 2017. Located near the borders of Kazakhstan, China, and Mongolia, their melancholic doom-death carries the vast isolation of the Central Asian steppe.