Hello, here are the first five members of my (more or less) radical Deathwatch kill-team that is stationed on a Rogue Trader vessel. I'm not a good painter and I never will be, but I had a lot of fun doing them.
From left to right:
Brother Ancalagon of the Black Dragons, Dragonclaw assault marine. Melee specialist. Seconded to the Deathwatch on the explicit wish of then-Inquisitor Redfeather and the other members of the kill-team after joint mission on Tyrea.
Brother-Epistolary Black Crow of the Night Wolves, usually acts as leader of the kill-team. Uses power fist in case he's forced to fight too close to Riverbear.
Kill-Marine Riverbear of the Night Wolves, untouchable, acts as scout, psyker assassin and diplomat/interpreter whenever blowing xenos up isn't the most beneficient course of action for humanity. Friend of Black Crow but usually keeps his distance during missions. Uses some collected pieces of xenos equipment which has brought him into conflict with more puritan members of the Deathwatch and the Ordo Xenos.
Deathwatch Keeper Barathiel of the Blood Angels (formerly tactical marine). Acts as quartermaster, advisor, diplomat where Imperial institutions are concerned and as a lockpick thanks to his clavis.
Deathwatch Champion Raziel, Black Shield. "Stipendium peccati mors est" ("The reward of sin is death") is the personal motto of the mysterious swordmaster who was made a Champion shortly after his admittance to the Deathwatch. So far no one has found out if he intends to kill all sinners he comes across or if he considers himself a sinner and seeks death. Raziel only speaks when absolutely necessary and secludes himself from his battle-brothers when not on missions.
You didn't miss a reference, the Silver Spectres are my Eldar "pirate band". They believe that the Eldar have to teach humanity to keep Chaos at bay. Both current Eldar politics and the Imperium are in the way of that, so they try to hinder the former and get a foothold in the latter through the Night Wolves, Radical Inquisitors and other more open-minded individuals in places of power. (I'll maybe post their story on the Rogue Trader boards after I have painted their seer.) don't have an exact timeline but I would place the crash of the colony ship into the very early Age of Strife directly after the Dark Age of Technology. The Luna Wolves came there relatively early during the Great Crusade (before they were renamed into Sons of Horus). The chapter doesn't consider themselves renegades, rather "loyal to humanity first, not the Imperium" of course they don't say that openly. They have nothing to do with Chaos though.