Face of the Band: Steven Wilson isPorcupine Tree. On earlier PT records, he actually was, as he was doing every part himself.
He's also a regular in several other bands like Blackfield and No-Man, has performed on albums by Dream Theater, Opeth and Pendulum, just to name a few. Productive guy.
This is not even getting into his solo side projects, which aside from the obvious self-titled stuff includes Bass Communion (ambient drone music) and the Incredible Expanding Mindfuck (experimental rock). Productive doesn't even begin to cover it.
Fear of a Blank Planet in general. The music video for the title track takes this Up to Eleven.
Some of their older stuff can be Nightmare Fuel also. Try listening to "Up the Downstair", "What You Are Listening To", "Voyage 34 Phase IV", and "Space Transmission" alone in the dark.
"Bonnie The Cat." Holy shit, Bonnie The Cat. It talks about rape and subsequent pregnancy FROM THE RAPIST'S POINT OF VIEW. Well, Steven Wilson did say he likes to write about things that are scary to him..
"Radioactive Toy" deserves a special mention, since it was inspired by the movie Threads.