A substantial proportion of the Polish-Lithuanian army at Beresteczko was the infamous Pospolite Ruszenie, less-than-enthusiastic amateurs drawn from the extensive Polish nobility. In the fantastic-looking By Fire and Sword rules system, they actually have a special rule called "We are here to be seen, not to fight".
So with that in mind, here is a posh young nobleman striking a heroic pose astride his faithful steed. In my haste to use the wonderful mounted officer that came with my recent artillery purchase, I kinda skimmed over some details. The cravat might be forgivable, it was a reasonably established fashion by the next decade, so maybe this guy is an early adopter. On the cutting edge of fashion, so to speak. I'm less happy about the basket hilt on the sword. It feels distinctly un-Eastern and I may yet go back and trim it off.
I'll be honest, these noblemen are not going to look that different from my mounted Cossacks, since they'll be using a lot of the same head and arm bits. My main ploy to distinguish them will be to give the nobles plenty of war hammers, and paint them more colorfully.
Finally: it turns out I really don't like painting horses. Perhaps I should have taken that into account before choosing such a cavalry-heavy conflict to collect. Oh well, too late now. I'll eventually go back and finish all the mounts that I've been ignoring.