Daredevil #181- especially the sequence where Bullseye stabs Elektra, then disguises himself and follows her incognito to watch her death on Matt's doorstep all done subtly in the background, was brilliant.
A couple scenes done by Mazzuchelli from DD "Born Again" also come to mind- The phone call to Urich, where the nurse forces him to listen while she murders Nick Manolis, the whole "there is no corpse" scene with the Kingpin.
Walt Simonson from Thor #362- Kurse standing alone at Gjallerbru
Grendel #9 by the Pander Bros. "And as to the problem with Dominic Riley.... eventually I killed him" are the only words in the entire story bookending Grendel's systematic tormenting and torture of Riley. There are also a few stories drawn by Wagner in issues #'s 16-20 of the original Comico Grendel run where he experiments with different ways of artistic storytelling that might make for interesting discussion. There are any number of examples throughout the run from a variety of artists to choose from, in fact.
Dozens of examples from Calvin & Hobbes by Bill Watterson.
Might not be what you're looking for but they're what came to mind for me when I think of sequential storytelling.