Without adding an extra 16 figures per unit at this stage (notwithstanding a permanently open option on doing so in the future...) I think I have an outline for a "Landsknecht Project".
Something like this:
The Good Duke Sigismund von Alzheim
One 80-strong Landsknecht "Regiment". Die Blauen. For hire. Reasonable rates, satisfaction proffered. Mostly. Looting? Well, if pay is sufficiently in arrears.
The not so Good Freiherr von Herkheim
One 80-strong Landsknecht "Regiment". The Black Band of black-hearted knaves.For hire. Reasonable rates, satisfaction proffered. Under the right circumstances. Looting optional.
Ritter von Gaustadt, a man who enjoys a good time (ein geiler Bock* in the common tongue).
One 24-strong Gens d'Armes Regiment. "die Unaussprechlichen". Ahem.
Franz das Kamel.
Master of the Esoteric Order of the Artillery. A captured town's church bells are his, by ancient right.
An amazing medley of gimcrack cannon of all kinds.
*OK, yes, I did just find a German slang glossary online. Happy days.
UPDATE: Since my last go at this post, I've taken another close look at the Willie Catalogue and it seems to me that the ECW Cuirassier might also do as either a Reiter or as a ... Cuirassier - ie, a chap in 3/4 armour with a fully-enclosed helmet. Also, the Spanish Mounted Arquebusier from the Conquistador range has uses both as a mounted arquebusier and as a light, lance armed cavalryman. A dozen of each type perhaps? Is that another four units of medium and light horse? Hm. Hm. Hm.