The IT Crowd

Roy and Moss make up the IT department at Reynholm Industries, and Jen is hired to manage them. Finding them not easily managed, Jen instead tries to be the bridge between the two socially awkward outcasts and the rest of the company, which is made up mainly of good looking, young, and shallow Brits.
Noel Fielding (of The Mighty Boosh) occasionally pops in as Richmond, the once power broking business man turned goth sent to live in a back room in the IT department, which is the basement, as punishment for crossing the company's CEO.
The opening song alone makes this series worth existing. Episode one starts out a bit over the top shouty and sit com-ey, but the show gets quite a bit better as it goes along.