I sadly do not have much to offer in way of dudes for him but Tanwen Selwyn was a year or two off of him in Hogwarts and would have been friendly if he noticed her but likely, tbh would have just flown under his radar unless he was the type to notice the quiet kids. She could potentially try to hurl @"Adrienne Selwyn" at him though if her niece/cousin showed any interest - or what she could even misread as interest oops.

And let's be real, Octavia Fawley definitely tries to flirt with him at any balls/events they both attend because she's long since convinced herself she has a fascination with him.