The only trouble with these practically arbitrary lists is that they aren't actually plots. Tragedy is a "plot?" ("Okay, so tell me the plot of the new movie." "Okay, are you ready? Here it is -- tragedy!") And "the quest" and "voyage and return" sound suspiciously like the same thing. Can't you slay a monster while on a quest? Or a voyage? Joseph Campbell argued, convincingly IMO, that there is only one hero plot.