I can offer a few options~

He's the same age as Gus, and I feel like their personalities would help them get along splendidly. He's also really good friends with Irene.

@"Zinnia Potts" is an artist herself, albeit a few years younger than him.

Timoleon Maxime also went to Beauxbatons, is a couple years older than him, and probably would have bullied the shit out of him. (I'msorry. Leoisn'tverynice.)