Favorite Uncommon/Rare Chapters

I just wanted to get a poll going of peoples’ favorite uncommon/rarely spoken of Chapters! For me, it’s:

- Nighthawks - simply due to their icon,
- Shadow Wolves - IF Successors with a melee focus who were thought to be extinct, but reported to be on Cadia during the 13th Black Crusade, which is just cool to me from a “Fuck you, fate” angle, and,
- Red Wolves - simply due to the fact they’re as rare as their real life counterparts

Feel free to link yours, as I’ve always liked learning about the more rare things generally, but especially with WH40k as of late!