As some of you know I don't really like death metal. When I got into death metal I got more or less tired of it after six monts or so. There are a few songs that I still like and they are:
Hypocrisy "Roswell 47" (+ the ballads from the record, which aren't death metal though)
Dismember "Dreaming in red"
Hhhmmm...I thought there was more, but maybe I can't remember them right now. I still think Death (the band) is listenable ("Symbolic" is my favorite) and so is Dark Tranquility's "The gallery".
If Opeth goes under the death metal banner I would say more or less all their songs!!!