These are the bands I love, well some of them.
You can check them out on playlist.com
As I lad Dying "Probably my favorite"
All that remains
All shall perish
Atreyu
Bleeding Through
Unearth
311
Brandnew
Avenged seven fold "Some of their old stuff"
Job For a Cowboy "really hard core"
August burns red
Bullet for my valentine
Haste the day
Taking back sunday
War of ages
Just check them all out, there all kinda hard core besides 311 haste the day and brandnew but there all really good bands with awesome songs.