RAWK is a parody of the real-life band GWAR. Characters from left to right are: Stalacta Strata (parody of Slymenstra Hymen), Pickaxe Da Crusha (Jizmak Da Gusha), Igneous Erodus (Oderus Urungus), Orefrack the Maw of Doom (Balsac the Jaws of Death), and Hoofquake the Beefy (Beefcake the Mighty).
This is it. The apex has been reached. There is no way it can go higher.