That Comics-haters Should Try List Poll Article Movies Books Music Television Search Forums Search Misc. Here is the list you requested. All those terms are misleading. Dark Knight, Concrete, Watchmen, and Sandman are all serious.
Bone is light-hearted and good for all ages.
Usagi Yojimbo draws on Japanese history, and is excellent. If I told you it centered around a Samauri rabbit, you would neither take me seriously, nor read it, so I won't tell you that. Funny and touching and very real . But other than that, I don't read many comics that haven't been referred to me. I can provide more information on any of the other titles, but if you liked that, I think I can safely guarantee that you'll like The Watchmen , if nothing else.