Roger Waters was Pink Floyd's lyricist from Dark Side through The Final Cut.

Yes. Roger Waters wrote the vast majority of Pink Floyd’s lyrics between 1973 and 1983. That includes Dark Side of the Moon, Wish You Were Here, Animals, The Wall, and The Final Cut. David Gilmour contributed a few lines here and there (like the “Time” lyrics were actually Waters? Wait—Gilmour wrote the lyrics for “Time”? No, Waters wrote “Time.” Gilmour wrote “The Great Gig in the Sky” lyrics? No, that was Waters too. Actually, Gilmour’s first major lyrical contributions came later, on A Momentary Lapse of Reason and The Division Bell. During the ‘73–‘83 run, Waters was essentially the band’s only lyricist.

That’s also why the band fell apart after The Final Cut.