Inis Mona is probably the best song I've heard by Eluveitie, so you might want to check that one out too.
Anyway, I'd heard about Helloween ages ago, but I'd never properly listened to them until today when I heard
Heavy Metal Is The Law. And wow. I don't think I've ever heard a bass solo in a metal song before. I don't really like the vocals, but I'll definitely have to listen to some more of their stuff.