All of Morrissey's lyrics tend to hold the same quality, which is good. Ian Curtis, on the other hand, was good, but not as spectacular as people make out. If we're just going to stick to lyrics, then The Smiths win hands down. All I need to get me through the day is Reel Around the Fountain.
Musically, it's more complex, since you have to place Johnny Marr against Hookie and Sumner. But, that's another topic for another thread...