Heinrich FINCK from the Mass for 6 voices: Sanctus
OCKEGHEM Missa cuiusvis toni for 4 voices, can be adapted to whatever Mode is required for the day, here arranged in the Dorian.
DESPREZ Missa Malheur me bat
Schola Cantorum Stuttgart Clytus Gottwald, cond.
I'm tempted to look for other versions of the Ockeghem to explore the differences in the sound the different modes produce.