I am going out on a limb here when I ask for this.
 

Does anyone know is there are groups out there that resemble blues but mixed with heavy rock/metal?

I like how Zepellin mix blues with rock and I was watching Metalocalypse (awesome show) where they play a bluesy type song and it sounded really good.

I really hope there is and, if there is, its actually good.

Down
Corrosion of Conformity

The Black Keys

Pretty much exactly what you are looking for

Pretty much the entire sub-genres of Stoner-rock and sludge take heavily from bluesy influences

Also, Sabbath

Some Rollins Band stuff.