Toast of London
GM Darkplace
Ghosts
The League of Gentlemen
The Office (UK and US although the US versions later seasons are average at best)
Peep Show
Spaced
Bottom
IT Crowd
Black Books
Father Ted
Green Wing
15 Storeys High
Fawlty Towers
Porridge
Parks and Recs
Always Sunny in Philadelphia
Extras
Red Dwarf
Phoenix Nights
I'm Alan Partridge
and then, if we're including sketch shows:
Big Train
The Fast Show
Harry Enfield and Chums
Limmys Show