There are LOTS of comics that aren't super-hero books. Archie, Bone, most European books (Tin Tin), most manga, lots of independent books (people love Enid Coleslaw from Ghost World), many horror series, the very popular Vertigo line (for the most part). What's more, even in the super-hero genre, there are many popular non-hero characters like villains and supporting character (One of my favourites? J Jonah Jameson). But most important, don't forget comic STRIP characters! Snoopy, Calvin and Hobbes, Dogbert, Garfeild, Spy Vs Spy, Opus, Bill the Cat, etc.
So superheroes would count but they would be just a part of a larger tapestry. A signifigant part to be sure, but I think that you said (and I could be way off but feel free to correct me), that we are far enough away from certain list that we should redo them. Super-heroes was the second list we did. Lots of changeover since then. So, I don't really think it's splitting hairs as you not being able to see that a certain medium is very diverse in what it can do. That would be like saying all plays are musicals, which is just insane.