Temperus Maximus
Temperus Maximus is the Chapter Master of the Angry Marines, by virtue of being the angriest Marine in the chapter, if not in the entire Imperium of Man. He's got a pair of chainfists with assault cannons built in and Khorne is fucking scared of this guy.
It is believed by many imperial citizens that Temperus Maximus is the holy equivalent of a daemon prince since his anger is beyond even the Emperah's comprehension.
Records say that an entire World Eaters Warband ran like little pussies just by the sight of this angry beast and it is unknown how old is he but he's been around for quite a while though, His main goal is to teach the World Eaters just who is the angriest space marines around.