Boards of Canada havn't been in much of a pop style spotlight, but I think they have made more of an impact than most in the underground idm and downbeat scene. Most of your favourite emo bands that all you emos love today will probably list Boards of Canada as a favourite.
They're known for revamping old 60's and 70's tv show samples, which are by nature grainy and rough, while puncuating them with idm style percussion.
Always and interesting riff or synth melody, always a delve into an ambient atmosphere.
This one caught me with the heavy drumkit sequence towards the end: