What to Play when there is 3 Dominant 7th Chord Progression?

Total 27 pages of PDF sheet music to download.

I wrote 4 examples of piano solo line over this chord progression.

V7/IV - II7 - V7

Example 1 is about "Question and Answer"

Example 2 is using 6ths interval.

Example 3 is rhythmic figures to play.

Everything is in all 12 keys!