extreme metal bands:
Spite Extreme Wing (lyrics in italian) they are great! Argento is a genius.
Imago Mortis
Forgotten Tomb
Hortus Animae and also Hate Profile
Extrema
There are a lot of great epic metal band here
Doomsword (one of my favourite bands)
Wotan
Holy Martyr
Icy Steel
Battle Ram
If you like prog you have to listen to Adramelch (Vittorio Ballerio is an incredible singer) and Moon of Steel
While for the classic HM sound check out Strana Officina, Crying Steel, Fire Trails and Vanadium (PINO SCOTTO RULEEEESSSS!!!!!!!!)
... and don't forget to check out the master of guitar, the fastest player ever, the supreme technique made flesh, the one and only... Mr. RICHARD BENSON (I'm joking, of course)
