The Harmonic Minor scale contains all the chord tones of the Minor 2-5-1 progression. It is a great scale to solo over this minor turnaround. The Harmonic Minor has a b6 and a major 7.
The Natural Minor at the root of the i chord also contains notes in both the ii chord (half-diminished, or minor 7b5). The Natural Minor scale has a b6 and a b7.
The Lydian Dominant chord adds a #4 to jazz up the V change. It's the same as the Mixolydian mode, except with a raised 4.
The Melodic Minor can be used as another variant of the i chord. The Melodic Minor (aka "Jazz Minor") has a Major 6 and a Major 7. Only the third is flattened. The seventh degree of the the Melodic Minor is the same as the altered scale. So if the V has a flat or raised 9 or 5, you can effectively move this scale so the 7th sits on the 5th degree of the i chord, and you will have the Altered scale for that Dominant.
The Dorian mode, which I didn't include, is another classic scale for the i chord.
Any of these scales can be used over the progression, but it is important to hit the chord tones (notably the 3rd and 7th) of each change.