I like The Expanse (tv series) very much. At first I didn't like it because of Holden. I usually don't like those "lawful good" characters, I kept watching it because of Miller.
Later seasons got better regarding Holden, but this last fifth season disappointed a good bit. I'm hoping for a sixth season though, the series is very good, but my two favorites characters are gone. Now the series = Avasarala, Amos and Clarissa for me. :/
I didn't knew about this The Expanse RPG, I will do some searching about it.