Yes there are more than just those two. There's one for every major and minor key. They all follow the same system, (chords built from successive thirds of the major or minor scales) so if you know one, you can know them all.
How to use them in Jazz improvisation, I'll leave to some of our impressively knowledgeable jazzers here.
As for scales, don't go changing scales on every chord. Focus on the chord tones of the current chord and use them as anchor points that you know will always sound good. If you don't know how to find the chord tones, then I would recommend you learn that before bothering with scales (other than the major scale, which you need to know in order to know the chord tones. The minor scales should be understood too).
|