Diminished, harmonic minor, melodic minor, blues scale, double harmonic major, alternate scale/super locrian.
Which one you can use depends on the chord you’re playing over. Generally speaking the harmonic minor, melodic minor and the blues scale work over the m6 chord, diminished, double harmonic major and super locrian work over the dominant seven chord. What to use over major6 chords I’m still not really sure because I usually play over either minor swing or Les yeux Noir and they only have minor 6 chords and dominant 7 chords.