What would be a good five paragraph essay topic on "A Good Man Is Hard to Find"?

You could
write about the "journey" of life.  The grandmother's journey from the beginning of
the story to the end is an amazing study.  The journey of the family--literally and
figuratively--they are going on vacation, there is a destination in mind but a detour knocks
them off course.  The spiritual journey is also possible since Jesus and religion are an
integral part of this story.  The journey of the Misfit and his life is also an interesting
possibility.

Good Luck and have fun!  Always choose a topic you are interested
in writing and learning more about or the work will not be enjoyable.  No one wants to dredge
through the arduous task of some lukewarm topic...not you as the writer, and not your teacher as
the reader.  :)