I realize that minor keys normally add non-diatonic tones, particularly from the harmonic minor scale.
Ruling that out, if we stick to the actual diatonic notes of the natural minor scale, and the seven triads based on them...
Is strict diatonic harmony EVER used in minor keys? Every question I can find about minor keys is answered with something about the harmonic minor scale, or substituting the major V as a dominant.
Do any of the 7 diatonic triads perform a Dominant function? (Actually, this answer seems to say that NONE of the diatonic chords perform a dominant function, and thus a minor key MUST use non-diatonic tones.)
Is there any diatonic chord that is 'normally' played as a seventh chord in minor keys? (Like the V chord is usually played not as a triad, but as a seventh chord, in major keys.)
Sorry this is 3 (or 4) questions instead of 1, but they are tangled up in my mind and I'm not sure how to separate them. Maybe there is one answer... maybe strict diatonic harmony is just never used in minor keys.