Gotta put in one more for Dorn, the Excoriators are a really interesting chapter. They're one of the few castings of Dorn that carry a gene defect(The Darkness), yet they are equally the staunch defenders & raucous assailants as their brothers of the 7th legion. They were one of the chapters assigned to guard the Eye of Terror, and I defy another lesser known chapter to come up with a better named Chapter Master than Zachariah Kersh.
It's time for my weekly plug for THE STORM WARDENS! Claymore-wielding, honor-driven, mysterious-origin-having Marine chapter from FFGs Deathwatch setting. T
Carcharodons, but if we stick with first founding then Raven Guard. Stealthy, melee carnage either way.
I just think not seeing a single Imperial Fist(or any another 7th Legion successor) is due to some kind of prejudice down the line against the only truly pure sons of our beloved Emperor. We are the only chapter left carrying on the Eternal Crusade, masters of the Siege, not a single marine from our hallowed ranks has fallen to the Arch-enemy, and yet we still find ourselves sidelined for what is apparently a battle crucial to the universe. The last time there was a battle that crucial to the universe, I seem to recall the chapter being asked by no-less than the Emperor himself to protect Holy Terra.