With the many of these sorts of threads that crop up, I don’t know why I never get tired of posting my favorites.
Ayreon, Blind Guardian, Divinefire, Dream Theater, Galactic Cowboys, Helloween, Kamelot, Nightwish, Pain of Salvation, Rhapsody of Fire, Royal Hunt, Savatage, Saviour Machine, Sonata Arctica, Symphony X, Theocracy, Wuthering Heights
Lately, I’ve been listening mostly to Sonata Arctica. Great band. If you’re into Finnish Power Metal, that is.