Chord Patterns
Having even their own Harmonic Staff,
     the chord patterns of Melo-Harmony are so neatly categorized
          that they become Archetypes in themselves.

The M34chord pattern is certainly the simplest and most fundamental.
The M74chord pattern seems the next most popular, followed by
the combination M3474 chord pattern of songs like Happy Birthday.
     However, so many songs are built on these patterns
          that there seems to be no valid reason to choose one over the others as an Archetype.