I'm aware that Progressive music has really died down since Rush slowed their album production, but I feel that Porcupine Tree deserves an honorable mention for keeping the genre alive. Porcupine Tree is a British Progressive band, and although a fairly old band, they're still pretty unknown. This is band that's overshadowed by more famous bands in the genre, such as Rush and (to an extent) Dream Theater. If you like bands that are similar to Pink Floyd, Muse, Rush, or Blackfield, you'll almost definitely love Porcupine Tree. They have several very well-known songs, but nobody really knows who the songs are by. With that being said, if you haven't heard of Porcupine Tree, I'm sure you've heard of the song in the video below.
This is one of those songs I was talking about, one of the songs you know, but don't know who it's by. Sound of Muzak, off of In Absentia (arguably their best album to-date), is simply a musical masterpiece that everybody on this planet must listen to. If you don't listen to this song, or this band for that matter, you are just missing out on one of the best musical experiences since Pink Floyd. All in all, easily one of my favorite "soft" bands to listen to, and probably one of my favorites overall. A must-listen for any kind of music lover.