From Hell is incredible. It’s The Wire in comics from–a deconstruction of an entire city, as well as the time period. Along with Akira and a few other comics, I’d put it up against the best art in any medium.
EDIT: I also want to clarify that by craft in my previous comment, I meant specifically comics craft. Gaiman and Morrison are great writers, among the best in comics, but it’s rare that a writer-artist team has the synergy to utilize the medium as well as a solid cartoonist. Brubaker/Phillips, Morrison/Quitely, Gaiman/McKean, Miller/Sienkiewicz & Mazzucchelli, Moore/Campbell & Gibbons, are some examples of writer-artist pairings that can compete with the command of the medium of guys like Otomo. The artists in these cases have the same level of command on their own, as well, but collaborations can leave things lost in translation, so to speak, even between great artists and writers. Truly synergetic pairings are very rare.