Harry Potter is very wanted over at f_rogers, among others from a variety of fandoms. Lily and James Potter are both there as are Harry and Ginny's kiddos (and Ron!), so Harry would have more than enough to keep him busy.
I would also like to get a few Ravenclaw guys in play. (Trio - Bradley, Roger Davies, Terry Boot, Anthony Goldstein, etc - or MWPP era.) Luna and Rolf are both in play, as is a Ravenclaw Benjy Fenwick. Benjy, at least, would love to have more brainy sorts about.