Time to undermine some opinions: to all of those people who said Ramones, you are actually wrong. The question only has one correct answer and that is the Clash.
They had actual song writing ability for a start and didn't just churn out the same thing time after time. They had the desire to spread their wings and pursue other musical interests, making them an all together more rounded, and if anything, more interesting band. And yeah, they did want commercial success so they could have better lives.. is there actually anything wrong with that?
So just to hammer the point home, to all of you who said Ramones, you get a big fat sticky-out tongue 