Some of theses bands are probably terrible (except a few). I just looked up "scary-looking bands" on Google, and I am basing this list off how creepy they look - not by how good of a band they are. Enjoy!
The Top Ten
1SlipknotSlipknot is an American Heavy Metal band formed in 1995 from Iowa. The band is best known as one of the pioneers of the New Wave of American Heavy Metal during the late 1990s - 2000s and are distinguishable by the band's clothing choices, consisting of black/red jumpsuits and horror inspired masks. ...read more.
Slipknot are absolutely amazing, eventhough their vocals aren't exactly have the best vocals, their look is awesome and creepy, which also matches the lyrics to their songs. They're terrible live though.
Besides being the only really good band on this list, these guys are seriously creepy. Especially Craig Jones (dubbed "Pin-Head"). - ThatStrangeKid42
Craig's mask is probably the darkest out of all their other masks.
Slipnot the best hevy metal band out there.
2Insane Clown PosseInsane Clown Posse is an American hip hop, horrorcore and rap rock duo consisting of rappers Violent J and Shaggy 2 Dope, that was formed in 1989 in Detroit. ...read more.
Although there's only two of them, they look scary in a weird way, and I wouldn't want to meet them in a dark alleyway. Or any alleyway. - ThatStrangeKid42
Um, they're not a rock band. Why? Because they don't play rock music. They're rappers.
3Hollywood UndeadHollywood Undead is an American rap rock band from Los Angeles, California, United States. They released their debut album, Swan Songs, on September 2, 2008, and their live CD/DVD Desperate Measures, on November 10, 2009. Their second studio album, American Tragedy, was released April 5, 2011. All of ...read more.
LISTEN TO THEIR SONGS!
4KissKiss is an American hard rock band formed in New York City in January 1973 by Paul Stanley, Gene Simmons and the band's original manager, Lew Linet.
KISS looks stupid.
There is nothing creepy about the way KISS looks - Johnnyt800
5Cradle of FilthCradle of Filth are a British extreme metal band that formed in Suffolk in 1991. The band's musical style evolved from black metal to a cleaner and more "produced" amalgam of gothic metal, symphonic black metal and other extreme metal styles.
6Twisted SisterTwisted Sister is an American heavy metal band originally from Ho-Ho-Kus, New Jersey, and later based in Long Island, New York.
7Black Veil BridesBlack Veil Brides is an American rock band currently consisting of Andy Biersack (vocals), Jinxx (guitar), Jake Pitts (guitar), Christian Coma (drums) and Ashley Purdy (bass), that formed in 2006 in Ohio. ...read more.
Black veil brides are not creepy at all, AT ALL.
8Motionless In WhiteMotionless in White, often abbreviated MIW, is an American metalcore band from Scranton, Pennsylvania.
These guys are amazing. Great vocals and also a great, creepy look. If you haven't heard them yet, you need to check them out!
10LordiLordi are a Finnish hard rock/heavy metal band, formed in 1992 by the band's lead singer, songwriter and costume maker, Mr Lordi.
11MudvayneMudvayne was an American heavy metal band from Peoria, Illinois formed in 1996. Originally from Bloomington, Illinois, they are known for their sonic experimentation, innovative album art, face and body paint, masks and uniforms.
12GwarGwar, often styled as GWAR, is an American heavy metal band formed in Richmond, Virginia, United States, in 1984, composed of and operated by a frequently rotating line-up of musicians, artists and filmmakers collectively known as Slave Pit Inc.
13TwiztidTwiztid is an American hip hop group from Detroit, Michigan. Formed in 1997, Twiztid is composed of Jamie Spaniolo and Paul Methric, who perform under the respective personas of Jamie Madrox and Monoxide. Twiztid were previously signed to Psychopathic Records and are associated with the "Juggalo" scene. ...read more.
14Marilyn MansonMarilyn Manson is an American rock band from Fort Lauderdale, Florida. Formed in 1989 by frontman Marilyn Manson and Daisy Berkowitz, the group was originally named Marilyn Manson & the Spooky Kids with their theatrical performances gathering a local cult following in the early 1990s. ...read more.
They're the definition of creepy.
15MushroomheadMushroomhead is an American nu metal band from Cleveland, Ohio. Formed in 1993 in the Cleveland Warehouse District, the band is known for their avant-garde sound which includes influence from heavy metal, art rock and electro-industrial and their imagery which features masks and costumes as well as ...read more.
16GorgorothGorgoroth is a Norwegian black metal band based in Bergen. Formed in 1992 by Infernus, the band is named after the dead plateau of evil and darkness in the land of Mordor (a fictional location in J.R.R. Tolkien's The Lord of the Rings).
17MayhemMayhem is a Norwegian black metal band formed in 1984 in Oslo, regarded as one of the pioneers of the Norwegian black metal scene. The band is also known for the infamous events surrounding them including the 1991 suicide of vocalist Dead (in which former guitarist Euronymous took pictures of Dead's ...read more.
18Dark FuneralDark Funeral is a Swedish black metal band from Stockholm Sweden, founded by guitarists Blackmoon and Lord Ahriman in 1993. They emerged during the second wave of black metal.
19GhostGhost is a Swedish heavy metal band that was formed in Linköping in 2008. Ghost consists of 5 masked instrumentalists, known as The Nameless Ghouls, and a demonic anti-pope known as Papa Emeritus. They have released 4 studio albums, 1 live album and 2 EPs. Each album brings in a new version of Papa ...read more.
20PortalPortal is an Australian extreme metal band whose style is an unorthodox fusion of death metal, black metal, dark ambient and experimental music.
21MisfitsMisfits are an American Horror Punk band often recognized as the progenitors of the horror punk subgenre, blending punk rock and other musical influences with horror film themes and imagery.
22Dimmu BorgirDimmu Borgir is a Norwegian symphonic black metal band from Oslo, Norway, formed in 1993. The name is derived from Dimmuborgir, a volcanic formation in Iceland, the name of which means "dark cities" or "dark castles/fortresses" in Icelandic, Faroese and Old Norse.
23Celtic FrostCeltic Frost was a Swiss extreme metal band from Zürich. They are known for their strong influence on the development of extreme metal. Formed in 1981 as Hellhammer, the band became Celtic Frost in 1984 and was active until 1993.
24King DiamondKim Bendix Petersen, better known by his stage name King Diamond, is a Danish heavy metal musician. He is known for his extensive vocal range, usually sung in falsetto. King Diamond was originally known as the vocalist for Mercyful Fate, but has become notorious for his horror themed Concept albums ...read more.
26Mercyful FateMercyful Fate was a Danish heavy metal band from Copenhagen, formed in 1981 by vocalist King Diamond and guitarist Hank Shermann.