Unitron
Why people think In Flames just abandoned death metal for money is beyond me, considering their style of melodic death metal has always been closer to heavy metal and alternative metal anyways. They just kept expanding and improving their sound, with Reroute to Remain being their peak. The two before this and several of the following albums are great too, but the songwriting on here is just through the roof. If it's not a amazing melody putting you into a state of bliss, it's a crushing hook of a riff getting you jumping. There's little electronic touches here and there, great acoustic moments, and right when you think you might get bored with a song they'll throw in some killer groove to wake you up.
If you're just looking for death metal, put on a Obituary or Atheist classic. However if you're looking for something that's both heavy as hell and beautifully melodic, In Flames has had that mastered since Colony and like no other band within the melodic death metal scene.