Actually I thought I'll just post my list of orgs and characters here so you can see what's going on. You can write for any of the characters or groups that take your fancy except the Archive and J- T-. (A researcher within J- T-'s Surreal Institute would be fine.)
The Archive of Unusual Events
Represented by the Archivist. The Archive records, and occasionally helps with, paranormal events. Its online presence acts as a news service for the paranormal research community. There is a sentient bromeliad on the reception desk.
Paranormal Department of the University of Western Australia.
A famous researcher and adventurer. Among other feats she has discovered at least one subterranean civilisation, is an expert on deity wrangling, beat an incarnation of Mars in an arm wrestling match, has published several well-cited papers on narrative determinism, and recently married her athletic lab assistant (now Mr. F-). Loves danger, low survival rate for her assistants.
Radio Controlled Aeroplane Hobbyists
A group of radio-controlled androids which spend their time observing airports. No one knows where they come from or where they disappear to. They are highly peaceful and have never been known to harm anyone, but have captured armed cultists simply by sheer weight of numbers.
US National Park Rangers
Know a lot more about the paranormal than they let on.
Similar to the Munroe Baggers of Scotland there is a society (of sorts) of giant climbers, who attempt to view and stand upon every known giant in their geographical area. They are most active in Europe, since that is where the most recorded giants are, but giants have been found worldwide. Giant climbers are considered rather foolish by the wider community, as giants are a) not actually very difficult to climb, rarely being more than 50 metres tall in their dormant state and b) liable to cause untold destruction to the local area if disturbed enough to take action.
The International Paranatural Research Unit. Has at least two known researchers designated Q- and R-. Q- is telepathic.
Cairo Inimical Artifacts Department
Searches for and contains artifacts inimical to humans and other lifeforms. Headed by a Sphinx called Jerribean.
The Good Knight Holiday Club.
They are a group of duelling and Historical European Martial Arts enthusiasts who travel around the world defeating Black Knights and thus relieving them of their vigils. They then take in the warriors, show them around the world, bring them up to speed on what they have missed and generally entertain them until the knight is ready to take up his post. The rested Black Knight can then return to his place and defeat the club member who has been guarding his post, gaining the guardianship once again. The Good Knight Holiday Club have become extremely adept at duels against heavily armoured opponents, and are rarely even slightly injured in the process. This is despite facing opponents who have centuries of experience with the sword. Techniques learned from the Black Knights occasionally filter back to the mundane HEMA movement, who are often keen to enhance their historical accuracy.
The International College of Librarians
Help keep the world safe from books.