Napoléon on the field of Eylau by Antoine-Jean Gros Another of my favorites. Almost all of the paintings of Napoleon from his time were majestic as fuck.
The Battle of Warka by Franciszek Smuglewicz (1745-1807)
The Deluge is a really interesting period. I particularly like the Polish-Lithuanian Commonwealth, so it's a bittersweet period. Anyways, there's a lot of good art that came out of the Commonwealth during that time. I'll post some.