My vote goes to AC/DC. These guys have made a KILLING playing the same garage rock for 35 years now. The only time their sound changed at all was when Bon Scott died and they got Brian Johnson. They haven't ventured outside their tiny comfort zone at all (that I've heard anyway). I mean, nothing wrong with a little mindless bashing out of rock tunes every now and again but it chaps my hide a little when there's tons of extremely talented musicians and songwriters struggling and having to take a 9-to-5 to make ends meet and meanwhile AC/DC makes money faster than anyone can count.