Let's see. I have 3 who could use some tighter bonds. Plus for people who need things: Davey is always up for a snog or friends in his year/house. Evan is Evan. And James is James.
Thomas's strongest connections, Wil and Tam, are on haitus atm, so he needs some other connections, or else I might put him on haitus too. He's cousins with Betram, so maybe we need to strengthen that? He's Gawain's roommate and might be going into Auror training so maybe more there?
Georgia my vapid blonde is definitely not everyone's cup of tea, but she is also a lot deeper than she seems and I haven't really found a way to show that in game either. That said, she is a bit weird, and it may be better to keep her as 'flavour' and not a main plot character, since I can post for her without real plots.
Dirk has Ophelia... he really should have some friends he doesn't sleep with.