Amon Amarth
rather okay

Cannibal Corpse
meh
Blind Guardian
awesome

Falkenbach
haven't heard
Bathory
best one you named
JFAC
worst one you named
Immortal
meh

Some of my favorite death metal bands are Mithras, Demilich, and Morbid Angel. Favorite thrash bands are Megadeth and Coroner.