Ralif Redhammer
Legend
Good call! Its simultaneous subversion and love of the superhero genre is no small feat, and absolutely changed the face of comics. I think I'd add From Hell to the list as well for Moore. It's so insanely dense with research and tiny details.
When it comes to more traditional comics, I'd add the Amazing Spider-Man Epic Collection vol. 1. I've been going through the various first volumes of the big superheroes of today, and it's clear that they were on fire with Spider-Man. Compared to the others, there are almost no filler villains - no aliens, underground mole people, and communists. Those three show up so much in the other comics like Iron Man and the Avengers. But Spider-Man, right off the bat, has some of his most iconic villains. And his personality is so much more developed and relatable.
When it comes to more traditional comics, I'd add the Amazing Spider-Man Epic Collection vol. 1. I've been going through the various first volumes of the big superheroes of today, and it's clear that they were on fire with Spider-Man. Compared to the others, there are almost no filler villains - no aliens, underground mole people, and communists. Those three show up so much in the other comics like Iron Man and the Avengers. But Spider-Man, right off the bat, has some of his most iconic villains. And his personality is so much more developed and relatable.
Watchmen by Alan Moore***