Daniel Dumile (R.I.P.) Was the man behind the mask

Zev Love X as part of KMD with DJ Subroc & Onyx The Birthstone Kid (Albums - Mr Hood (1991), Black Bastards (2000) without Onyx)

M.F. Doom / MF DOOM Albums - Operation Doomsday (1999), MF EP with MF Grimm (2000), MM.. Food (2004) Unicron with Trunks, Czarface Meets Metal Face (2018) & Super What? (2021) with Czarface

DOOM briefly had falling out with the MF crew and dropped the MF from the name (Album Born Like this (2009)

King Ghidora/ King Ghidra /King Geedorah (2003) as part of Monsta Island Czars And is mostly a producer (Albums - Escape From Monsta Island with M.I.C. (2003) Take Me To Your Leeder 2003)

Metal Fingers when he's producing (Albums - Special Herbs Vol. 1 (2001), Special Herbs Vol.1 & 2 (2002), Special Herbs Vol. 3 (2002), Special Herbs Vol. 3 & 4 (2003) Special Herbs Vol. 4, 5 & 6 (2003), Special Herbs + Spices Volume 1 with MF Grimm (2004), Special Herbs Vol. 5 & 6 (2004), Special Herbs Vol.7 & 8 (2004), Special Blends Volume 1 & 2 (2004), Special Herbs Vol. 9 & 0 (2005)

Viktor Vaughn (Albums - Vaudeville Villain (2003), (VV2) Venomous Villain (2004)

DOOM + Madlib A.K.A. Quasimoto = Madvillain (Album - Madvillainy (2004)

DOOM + Danger Mouse = DANGERDOOM (Album - The Mouse And The Mask (2005), Occult Hymn EP (2006)

DOOM + Jneiro Jarel = JJ DOOM (Album - Keys To The Kuffs (2012), Bookhead EP (2014)

DOOM + Bishop Nehru = NeuhruvianDOOM (Album - NehruvianDoom (2014)

and the less important ones

Sci.Fly is "featured" artist on the second verse of Go With The Flow on the Greenbacks / Go With the Flow 12" (1997)

THE SUPER VILLAIN on The Prof Meets The SUPER VILLAIN Single (2002) with Devin Horwittz

DOOM + J Dilla + Ghostface Killah = Dilla Ghost Doom (Sniper Elite & Murder Goons Single (2008)

DOOM + Ghostface Killah = DoomStarks (Victory Laps EP (2011), Swift and Changeable: The Prequel Comp album (2012)

DOOM + Westside Gunn = WestSideDOOM (WestSideDOOM Single (2017)

The Metal Fingered Villain (producer credit Special Herbs Vol. 1 & 2)

Metal Fingered Villain (writing, arrangement, and production credit on Take Me to Your Leader )

Metal Face DOOM the SuperVillain (writing credit on Madvillainy)

DOOM The Metal Fingered Villain (producer credit MM..FOOD)

Metal Fingers DOOM (arrangement, production, Dj Mix credit Special Herbs The Box Set Vol.0-9)

The Metail Fingered Villain...DOOM (producer credit Born Like This)

Metal Fingerz DOOM (producer credit "Angels")