For your consideration: The Warehouse, a panfandom RP set in the Warehouse 13/Eureka universe. It's opening on Tuesday, so currently it's probably a little small for your preferences, but the AC's one thread a month, and it'll have an opt-in meta plot and Artifact plots.

Any of your canon list would be welcome, though Lily in particular is on our request list right now. If it catches your eye, we have a test drive up!