Mortarion, Daemon Primarch of the XIV Legion 'Death Guard'

"You are my unbroken blades. You are the Death Guard. By your hand shall justice be delivered, and doom shall stalk a thousand worlds" — Mortarion, on accepting the leadership of the XIV Legion.

Rhoxx, Plague Dreadnought

Rhoxx was once a sergeant in the ninth company of the Death Guard, a valued and stalwart Astartes of the XIV Legion. Mortally wounded at Istvaan III during the traitor Legions' war on their loyalist members, he was encased in Dreadnought armour to fight on in Horus's crusade against the Emperor.

Blightshroud Terminators

The first thing that hits you is the smell of corruption. In seconds it's a stench of rotting meat and waste, death and disease and putrefaction. Tears fill your eyes as the miasma flows into the room and in seconds the tears are mixed with blood.