Bruce Dickinson/Nightmare Fuel

The voice of Iron Maiden doesn't need his respective band to be creepy, after all. Sometimes when he shouts "Scream for me", he really means it.

Laughing in the Hiding Bush is very unsettling, especially the chorus. The fact that it was written by his son, who was a kid at a time, somehow just makes things creepier.
Accident of Birth is pretty terrifying too. In addition to the industrial sounding percussion and the dark, thundering melodies, the song is about a family from hell. The song also gets scarier when you realize Bruce was a birth that was never meant to be, thus the title.
- The whole album, really. "Darkside of Aquarius" chronicles the apocalypse with one last horseman waiting to emerge. The song's message is that the apocalypse is already happening right now and humanity is unable to see it. "Starchildren" is about children who have been exposed to nuclear materials and are hideously deformed, however they may have superhuman abilities as well. Most of the tunes have a dark and threatening song to them as well. And the last track, "Arc of Space" is a soft flamenco ballad about religious suicide cults.
- Now it's Omega Zero Day, the red star shines its last rays, the sun that gave us life yesterday is now the sun that takes our lives away...
Pretty much the entire Chemical Wedding album, but Killing Floor comes to mind.
Believil. Just... Believil. A slow, eerie piece of doom metal with odd chanting and evil low pitched maniacal laughter.
- Then there's the title track from that album, A Tyranny of Souls, which is a retelling of Macbeth but with a horrifying alternate ending.