Carcass's early work is grindcore or death/grind up to their 3'd album. After that they became melo death. The track you heared is a example of their (worse) melodeath output. Their earlier work is certainly worth checking out
Decapitated and morbid angel are both worth checking out futher in depth aswell.
The other death metal bands except at the gates are all rather boring.
Actually, no I haven't. You've certainly misunderstood that what I'm writing here is a collection of my opinions. Your opinion on those vocals clearly differs from mine, but that doesn't make mine wrong or yours right.
Aren't opinions beautiful like that?