[@Jbcool]
So I wont be able to make a CS until Sunday, so I'd like to spitball some more ideas if you're cool with that. First, a latent blank or psyker that having recently discovered their powers wants to desparately avoid being taken by blackships. Probably very low tier, manifesting their genes as kiddish annoyingness or a suspicious track record at cards. Another is a Squat, either an Engineer that would be far more comfortable with tech heresy but not nearly as proficient with archaeotech as a Tech-Priest, or a bounty hunter Dwarf like the new necromunda model. A Space Marine on a penitent crusade, but with a good chunk of his comrades dead he has to find a new way to saunter around the galaxy, his power armour mostly defunct and his Astartes weapons long expended and discarded in favour of human ones. A Bon'ead Ogryn that after much cybernetics has reached a vaguely human level of intelligence having from birth been a wise shaman of his kin. At last avery bright Lexmechanic unable to advance for nearly a century because of some minor thing done long ago, and deciding to go with the RT out of frustration.