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Thrones is the long-running solo project of American bassist Joe Preston, begun in 1994 and given to bass-heavy doom, avant-garde noise rock and experimental drone. Preston is a scene hub in his own right — a former member of Earth and the Melvins and a guest on Sunn O)))'s recordings — and Thrones channels that low-end lineage into one-man records like the Southern Lord compilation Day Late, Dollar Short (2005). The music pairs crushing riffs and heavily processed vocals with an eclectic, unpredictable sensibility.

Opium Warlords is the solo-turned-trio outlet of Sami Albert Hynninen (Albert Witchfinder of Reverend Bizarre), stretching doom metal into extended drone-riff meditations with minimal percussion. Since 2010 he has been joined by drummer Erkki Virta and keyboardist Laura Länsimäki, though the project remains built around Hynninen's distorted bass and bleak conceptual framing. Six albums deep on Svart Records, the band trades hooks for duration, dissolving riffs into noise and silence.

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Khanate was an American drone/extreme doom supergroup formed in New York in 2000 by guitarist Stephen O'Malley and bassist James Plotkin, with vocalist Alan Dubin and drummer Tim Wyskida. Their glacial music paired extremely slow tempos and harsh layers of feedback with Dubin's torturous shrieking, debuting with a self-titled album on Southern Lord Records in 2001. The band split in 2006 before a surprise return with the album To Be Cruel, released via Sacred Bones Records in 2023.

Boris's early drone/doom era built monolithic, amplifier-worshipping slabs of sludge, doom and drone metal, frequently structured as single extended long-form pieces rather than conventional songs. The 1996 debut Absolutego is a 65-minute track of oozing, slow-motion, Melvins-inspired drone rock/metal, while Flood (2000) unfolds as one roughly 70-minute title track broken into four movements. Across Amplifier Worship (1998) and Boris at Last -Feedbacker- (2003) the trio pushed feedback, distortion and glacial tempos to the foreground, a sound whose kinship with Sunn O))) later yielded their joint album Altar.

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Burning Witch was an American doom/sludge metal band formed on Capitol Hill in Seattle in early 1995 from the ashes of the doom/death band Thorr's Hammer, active until 1998. Known for extremely slow tempos, dense feedback and Edgy 59's alternately mournful and tortured vocals, the group is best remembered as a formative pre-Sunn O))) project for guitarist Stephen O'Malley. Their EP recordings were gathered on the compilation Crippled Lucifer, released in 1998 on Southern Lord Records, the label O'Malley co-founded with fellow Seattle musician Greg Anderson.

Reto Mäder's long-running Sum Of R has cycled through several lineups since 2008; the current Swiss-Finnish incarnation with Marko Neuman (vocals) and Jukka Rämänen (drums) pushes furthest into ritual drone-doom territory on 2025's Spectral, an 'acoustic séance' of tape manipulation, mellotron, and psychedelic doom built around sustained tones rather than riffs. The record pulls in a small constellation of scene names as guests — Juho Vanhanen of Oranssi Pazuzu, Vicotnik of Dødheimsgård, and G. Stuart Dahlquist of Burning Witch/Goatsnake — placing the band at a crossroads of drone, post-metal, and avant-black circles, even as Mäder's other projects (Ural Umbo, Hexvessel, Dark Buddha Rising) sit outside this atlas.

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Beneath the Sod is the solo funeral/industrial doom project of Irish musician Ray Keenaghan (Wreck of the Hesperus), formed 2017. Releases include Circling the Drain (2017, Fort Evil Fruit), the split cassette Transmorphic Eye (2018, with Crypticum), and a self-titled 2021 EP on Cursed Monk Records described as harsh, synth-laced industrial doom metal with guest vocals from Richard Carson.

German experimental/noise act (Mainz) built around destructive recording techniques rather than conventional songwriting — their Radiant Eulogy series deliberately degrades master tapes (sun exposure, physical decay) to bury heavy doom riffs under crackling, collapsing signal. Prolific (37+ Bandcamp releases since 2013) across noise, post-metal, drone, doom, and post-rock with electronic/tape elements. Sits closer to power-electronics/drone art-noise than conventional metal songcraft.

Solo instrumental drone/doom/dark-ambient project by Tim Roberts (Savannah, GA). The substantial release The Prophet Killed (2013) is a concept album about a Biblical prophet, built from eight very long-form tracks (1:37 to 16:47, ~70 min) of sustained tones, slow doom-weight passages and dark-ambient atmosphere per the artist's own genre tagging (Ambient, Dark Ambient, Doom, Drone Metal, Experimental).

Ecuadorian experimental collective from Guayaquil ('Psychedelic-Noise-Arkestra') led by multi-instrumentalist José Francisco Ycaza (aka Esquizoide 0nírico), billed 'Arkestra Director' in the Sun Ra tradition. Their 2019 album Nodvs Gordivs (Pensador Records) is a long-form concept piece weaving Castro, Alexander the Great and the Sabazios cult into a psychedelic doom/sludge/krautrock ritual built from extended pieces of noise, orchestral texture and heavy riffing.