I can give you Morwenna Skeeter to tell him he's a fool whilst surreptitiously being amused because he's not her son so not her problem and she will enjoy his parents losing their shit. Also Caitríona Connolly who hates him.

You can also have Enoch Rosier who doesn't like working with a girl so will prob try to get Barney to stop her working now, and Marlena Scamander is a fellow Ministry worker who could have seen stuff and/or be defending Maeve from being tricked - and will be a surer hitter with posts because she is my Nano tribute :D