Pink Floyd gained recognition as part of the underground psychedelic movement in the 60s and early 70s, but they have since become one of the most popular bands in the world. This largely resulted from a ridiculously strong four-album stretch from the mid- to late-70s: The Dark Side of the Moon, Wish You Were Here, Animals, and The Wall. These are considered the band's best work, and that's pretty much true. They do have other stuff, though.