The B. Kliban book, "Never Eat Anything Bigger Than Your Head," was the most original, funniest and thought-provoking cartoon series that I've ever seen. For humor value I also like New Yorker cartoons, but they are locked in a kind of workplace suburban conventionality that seems less original than Kliban, and anyway they use multiple authors for their body of work.
A "predecessor" of Gary Larsen? Having had Kliban's book and then seeing Gary Larsen's series, Larsen's work is clearly derivative of Kliban, sort of like J.K. Rowling coming after J.R.R. Tolkein.
The book is still funny and mind-stretching, and my original 70s paperback copy is falling apart, so I'm taking the trouble to track down another copy.
Anyway, as far as I'm concerned this book is at the top of the heap of original cartoon humor and actually represents a new way of looking at everything in terms of parody from the early 70s on. Buy it if you dare.