I've found a score of a
Chambonnieres Sarabande that looks like it'll be worth printing off and analysing too. There's a lot of chromatic harmony that'll be worth taking a good look at
I will act upon your suggestion, trying out different textures by closely imitating phrases from the pieces we've been discussing with my own harmony and melody.
I listened to the clips from your sonata, and wish you every success with it. As a recorder player myself (descant tenor and bass) I enjoyed playing through the parts, they are very idiomatic - do you play recorder?