In which TV series is Abed Nadir a main character?

In which TV series is Sue Sylvester a main character? Who played Jeff Winger in 'Community'? Who played Troy Barnes in 'Community'? Who played Abed Nadir in 'Community'? Who played Alicia Florrick in 'The Good Wife'? In which TV series is Alicia Florrick a main character? Who played Elena Gilbert in 'The Vampire Diaries'? In which TV series is Elena Gilbert a main character?