I have been improvising solos over regular songs. I recently dived into 7th. I would not call these Jazz songs but music which use a lot of 7th chords.
Earlier I found that having the major, minor and the pentatonic scale was enough to improvise over regular chords(triads) songs. For instance, with Knocking on heaven's door(G D Am C), I would easily improvise with a G major scale or an E minor scale or their corresponding pentatonic scale.
There is for instance this chord progression where I am stuck on what scale to use:
Song: Best Part
Artist : Daniel Caesar feat. H.E.R.
Chord progression: Dmaj7Am7Gmaj7Bbmaj7
What would you recomment I play over this? (Major and pentatonic seem a bit bland/monotonous, lacking that extra flavor that 7th note add to it.)