Welcome welcome! I know you've been around my.... Inquisitor, Lucy Pevensie, Bellamy Blake, Natasha Romanoff, Seth Gecko, and Allison Argent before (Allison actually comes with her Aequorea memories), but I think you're unfamiliar (with my versions obvs) with most of the rest of my brood whom are here!
The most obvious people I have to throw at Poe are definitely Aranea (exmercenary) who I really think would mesh super well with him, Natasha (lhasseltii yes its just a different science journal for Black Widow haha), Ellana (ofandraste here as well), Bellamy (wearethefuture like at SA), and obviously Jyn (rebelstardust) and I am totally up for all and any plots and things!
Beyond the aforementioned obviously Ezra (wolfwilde)and him will get along and Rey will introduce them.