The Royale Allemond Cavalerie, one of three German heavy cavalry regiments serving in the pre-revolutionary French army. This and two of the following three illustrations have been swiped from Kronoskaf.
Fired with enthusiasm for those RSM95 French cuirassiers in bearskins, I have been paging through my books and looking around online for possible uniforms to approximate. I've (possibly) narrowed it down to these four and might even paint a troop of each since my fictitious regiment will be made up of contingents from some o the smaller principalities contiguous to the Grand Duchy of Stollen and the Electorate of Zichenau. See what you think. I suppose that I should also have a look at my Hans Blackwenn volume on the Reichsarmee.
The Nassau-Sarrebruek Cavalerie.
The Wurttemburg Cavalerie. I like this uniform a lot.
Last, but not least, my personal favorite, the Leib Grenadiers a Cheval from Wurttemburg.