Fuck yes. Ya'll are speaking my language!
Hard to whittle it down to just a couple, but here goes:
High on Fire: Madness of an Architect (Everything about it, the intro buildup, main verse riff, outro.. all massive!)
Operator Generator: Polar Fleet (Some excellent grooves on this one, remind me of Kyuss at times)
Acid King: Drive Fast Take Chances (Soo fuzzy, soo good, like a plodding behemoth)
Potion: Hallucination Rites (Little bit Electric Wizard, little bit Eyehategod in their slower moments, just filthy!)