The Exorcist(s): Peter Venkman (Bill Murray), Raymond Stantz (Dan Aykroyd), Egon Spengler (Harold Ramis), and, eventuallly, Winston Zeddemore (Hudson)

Pros: You shouldn't need to ask: has suppressing evil paranormal forces ever been so damn fun or cool? They've also developed their own unique technological devices to capture the nasties.

Cons: Getting them back together seems to depend largely on Venkman's availability/willingness these days.

USP: They tackle the ghosts with a sense of humour, and they combine their individual strengths to work as a team.

Business Card Slogan: Who you gonna call?