In Flames

One of the pioneers of melodic death metal (although it resembles more of a melodic "thrash" than "death" metal). They became a band kids recovering from nu-metal/mallcore would quickly pick up on. Eventually the band drifted closer and closer to commercial friendly "extreme" music starting with Reroute to Remain, which honestly wasn't that bad. From there, they made Soundtrack to Your Escape, a joke of an album where they forget they were good with solos and replaced their music with generic techno and nonsense nu-metal noise. Some people will excuse them and say, "the band needed to change, do you want them to recycle the same album over and over?!" while non-stupid people can simply see a bland desperate attempt to be the next Linkin Park here. Maturing your sound and conforming to market-researched music are two different things people! Thus another blatant sell-out band is born.