I am looking for bands similar to Amon Amarth.

Bathory kinda started it all with regards to the viking thing. Manowar - Sign Of The Hammer might be worth getting...dunno why, just kind of an awesome album overall.
Unleashed, definitely. Bal-Sagoth aren't actually epic because they're too cheesy, but they're really fun and awesome. You could also try The Absence for aggressive melodic death metal. The vocalist is the closest thing America has to Johan, as well.
 
Be'Lakor is fantastic and somewhat similar melodic death metal...


WOW it's been a while since I've been on this forum... hai gyz1!!