A lot of good bands listed here on this thread, here is a few of my favs, sorry if its been said:

PANfuckingTERA-sorry had to say it
Mnemic
American Headcharge
The Bled
Probot-Dave Grohls side band, surprisingly heavy as shit
Burnt by the Sun
DamagePlan
Corrosion of Conformity
Down
Dry Kill Logic
Hatebreed
High On Fire
Norma Jean-heavy as FUCK
Poison the Well
Superjoint Ritual-Phil.A of Pantera(RIP) side group, same with Down.


That's all I can think of at the top of my head. The Bled, and Poison the Well, are not super heavy, but still pack a mean punch. Check out High on Fire, Corrosion of Conformity, Down, they all fall in the same lines of stoner rock.

Check it oot, peace.