Gunnery Sergeant "Stonetooth" Harker
Sergeant "Stonetooth" Harker is the leader of the Catachan Devils regiment, THE most badass group of motherfuckers on Catachan.
While the standard Catachan guardsman is incredibly buffed beyond belief, Harker takes this three steps forward. His body and strength is incredibly massive and unbelievable that it's at par with a Space Marine's. Just as a basic example; he carries and shoots a Heavy Bolter as if it was just a lasgun AND he's able to move through the terrain like a scout while carrying that around. Hell, even Space Marines can't do that.
One of his most famous exploits was when his squad was ambushed by a pack of Tyranid Raveners. When Heavy Bolter was knocked out of his hands when the 'nids suddenly burst from the ground, Harker killed the one trying to kill him by crushing the frigging thing's neck between his massive biceps in record time, giving him enough time to ready his Heavy Bolter and cut the rest of the Raveners down. This deed alone gave him the pass to be in the same Friday night poker table with the likes of Straken, Stubbs, and Marbo.