Who played Mike Ross in 'Suits'?

Who played Nick Miller in 'New Girl'? In which TV series is Nick Miller a main character? Who played Harvey Specter in 'Suits'? In which TV series is Harvey Specter a main character? In which TV series is Mike Ross a main character? In which TV series is Rachel Zane a main character? Who played Olivia Pope in 'Scandal'? Who played Hannah Horvath in 'Girls'?