Without a doubt, this would go on my list.
System Of A Down - "Spiders" (1998)
The way this song builds up is incredible. The song starts with a quiet intro, just Shavo's chilling bass riff and Serj's haunting, soft vocals. It then explodes into a loud, but controlled, chorus. In verse 2, Serj is more firm, becoming more urgent in warning society that we are being watched. The chorus comes again, Serj's urgency growing. Then, Daron's simple yet incredible solo comes in. The entire band erupts into chaos at the end, Daron's guitar blaring behind Serj's screams and shouts, almost as if he worries no one will here him. Everything goes quiet for a gentle outro, topping off the beauty of the track.
Close your eyes and listen to it. It was released 21 years ago, and the exact meaning is still unknown. But one thing is for certain, it's a warning. A message to society. Serj's vocal talent here is incredible, and the band blends together to create a chilling, yet beautiful song.