The Perry Bible Fellowship (I don't know why they call it that) is the work of Nicholas Gurewitch. Many of the strips are in quite different formats, take more than a few seconds to get, and, well, are pretty dark. (1) (2) (3) (4) I suppose it's like The Far Side, only... more so.
Hey, book signings in Rochester soon! Oh, wait, I don't live near Rochester.