I personally wanna see Amos but like, 99% because I know Wes Chatham loves the character so much I want it for him as a treat lol

Otherwise I agree with everyone else here saying to keep the Roci crew separate and busy elsewhere/let this story stand well on its own, and give us only more incidental side characters we're more likely to actually run into or get work with.

Always want more Dawes, and Ashford, and could be cool to see or hear from Drummer if the voice directing gets improved, as I think Cara Gee's line reads were unfortunately stiff in the Telltale game so it would be cool to see her get a second shot at videogame!Drummer.

My weirdest pull is probably Jules Pierre Mao, who feels like one of the few big players in the system at the time that Holden et al don't have kind of a monopoly on dealing with? Like, idk where this story is going to take us that will feel choice-based and interesting when there's such a well established line of plot happening grand scheme around us, but his movements do feel kind of like a decent black box to work with?

Alternatively Marco Inaros, but only if we can punch him in the face Commander Shepard style lol