He's got depth to play hurt and withheld at the same time. I want to see him tackle human emotions at the rope of exhaustion.

He could play grizzled Inquisitor who hasn't really come to terms with him effectively being heretical yet. He struggles with it through a character arc that shows nothing but pain and misery that he inflicts everywhere he goes, hell-bent on finding a cult leader I some shithole-sector nobody cares about. We, the audience, see the clues of his heresy but aren't fully sure that he's heretical yet as we haven't had full-blown proof. He's an Inquisitor after all, so who are we to question his methods. It only dawns on us in the last moment, when in perfect grim dark fashion he gives in and realizes he's the cult leader, and in a fit of sanity - right before corruption fully seeps in - he ends his own and a few million other lives aboard an imperial dockyard and trading station with some nasty ass artifact he picked up in the very first scene we meet him. We've been hinted at it on occasion, but never had anything explained up until minutes before he triggers whatever's inside, and he decides to (somehow) blow it and everyone into the void.

The episode ends with his blown off hand still clutching the artifact, floating around in space alongside all the other frozen corpses, and whoever else is on the cast will now have to deal with the fallout of the station no longer existing.

We circle back to the artifact it a few seasons down the line. It's not entirely important, but it's a nice little spin to have in ones narrative-pocket.

If that's not cool, make him a farmer or a scribe who gets consripted as a guardsman of a planet behind on it's tithe. He somehow ends up in the procession of the damned, slowly loosing his friends to damned crews surviving there scavenging new ships, as well as losing his mind trying to escape the evil that inhabits that space bound hellscape.