Iron Monkey. Iron Monkey is a sludge band from England that came to a halt when their vocalist died. They have 2 albums, Iron Monkey and Our Problem. Highly recommended is Our Problem. Whether you are sober, angry, or just in the mood that requires slow, heavy riffs, pummeling/caveman like drums, and vomiting-induced screaming, this album is for you. Disclaimer: Do not listen to this band while drunk on whiskey, it will lead to fights, holes in walls, broken glass, the whole nine. However, if you do want that, then, well, this band will do it for you as well. Check out the link below!