Blood Angels
The Blood Angels were the 9th Space Marine legion created by the Empra and also known as the most batshit insane loyalist chapter in the Imperium without including the Angry Marines.
Their Primarch is named Sanguinius, a Marine who ironically has Angel like wings that mutated out of his back due to warp mutations in his homeworld Baal. Their current Chapter Master is a Marine named Dante, the oldest non-Dreadnought interred Space Marine in history.
Death Company
The "Death Company" is a group of Blood Angels who were afflicted by a mutation in their gene seed known as "Black Rage". This is where they see themselves as Sanguinius battling Horus in his battle barge. Long story short a marine afflicted with "Black Rage" will be almost as Angry as Angry Marine except that they can't control themselves and so if they aren't killed, they are locked away as they're too batshit insane to be controlled. While they are in battle though, a Death Company marine is just as fearless as an Angry Marine and charges into a group of enemies in a pure display of valor, devotion to the Empra and Sanguinius and most importantly RAAAEEEGGG.