I know there isn't that much information out there about Euxenippos/Euxenippus, but I feel like it would be interesting to talk about what I theorize his relationship with Bagoas was like. Personally, I feel like Bagoas and Euxenippus did get along--despite Bagoas constantly being paranoid about being cast out--because he didn't feel that threatened by him. Plus at that point Bagoas had a ton of wealth unlike when Darius was king.
Here's him in the Alexander movie; I love his Hermes outfit at the party:









