Originally Posted by: equatorThat`s right.
You get those chords when harmonizing the minor scale with triads.
If you wanna include other chords than triads; try harmonizing the scale with seventh chords or nineth chords:
Min7....Dim7....Maj7....Min7....Min7....Maj7....Dom7.
..................or..............................
Min9....Dim7....Maj9....Min9....Min9....Maj9....9
The Harmonic Minor gives you:
Min7....Dim7....Dom+....Dim....+....M....5b
Good thinkin'. 11ths and 13ths are also a few options you should consider, pen. Just be sure they're either in key or work properly as chromatic tones.