Children Of Bodom is melodic
Death Metal that integrates
Power metal-esque leads and solos. Therefore most people consider them melodic death/power metal, although just calling them melodic
Death Metal is fine too.
Similar bands that employ this style would be
Norther or Mercenary.
Also,
3 Inches Of Blood is more of a traditional
Heavy Metal band than a
Power Metal one. To me anyways.
I'll recommend a band to all of you that hasn't been mentioned yet and isn't a first-tier
Power Metal band: Demons & Wizards. It's a side-project of Hansi Kursch and Jon Schaffer, and while I think Schaffer is a insolent little shit, he does a good job on here and...well, Hansi fucking Kursch. One of the metal gods. Need I say more?
If you are a false, don't entry, or you'll be burned and died!