Bands you consider to have dealt the death-blow to their respective genres?

What are some bands you associate with killing a style of music (broadly or specifically). Not the band that led its genre on the path to failure (looking at you Nickleback), but the artist that had the "finish him" flash on the screen of public conscious.

Growing up with mainstream rock in the 90s and 2000s, I have always pinned this on Vertical Horizon.