Who played Ron Swanson in 'Parks and Recreation'?

In which TV series is Jax Teller a main character? Who played Sookie Stackhouse in 'True Blood'? In which TV series is Sookie Stackhouse a main character? Who played Patrick Jane in 'The Mentalist'? In which TV series is Ron Swanson a main character? Who played April Ludgate in 'Parks and Recreation'? Who played Andy Dwyer in 'Parks and Recreation'? Who played Tom Haverford in 'Parks and Recreation'?