Recent-ish collections by Simon and Kirby, Bernie Krigstein, Wally Wood, Steve Ditko and Joe Kubert might be of interest to you then, though much of this material is from the late 40s and 50s. Without splitting hairs too, Eisner's and Cole's comics are not your typical super hero stories. In Eisner's best work, the Spirit is pretty much just a detective in a mask, or even an observer of other people's stories, and Cole's comics are more humorous than heroic.