A minor tonic with ♭6 and ♭7 in the changes — i, ♭VI, ♭VII (Am F G).
natural minor (Aeolian) or the minor pentatonic — SCL·02
raise the 7 over the 5 chord (harmonic minor) for a real leading-tone cadence SCL·07
Minor pentatonic is the safe core; the full natural minor adds the 2 and ♭6 sighs. Only sharpen the 7 when a dominant 5⁷ actually appears.