Yes, DeadMan, this thread is a victim of its own success: so many recs that nobody bothers to look at them. One way to check what's already been mentioned is to use the "Search" function, which I find gives best results when you choose the "Show Posts" option. For Amon Amarth, it generates 421 posts, so we're back where you started, I'm afraid: too much material
Anyway, Amon Amarth are new to me, and here's the first song I found on youtube:-
For me, they're a little too heavy, and I really don't like that vocal style tbh, but your rec certainly fits the thread topic.