I voted Dutch as I am dutch of course, and they actually were formed to hold the French, even though that sounds weird but after the war the Netherlands got that land to make sure there was a powerful country above the French (I got this from my historical teacher - school).
And the Dutch fought at Waterloo, and they are sexy.
But between Spain and Sweden. Idk, Spain would be more logical if I am not historically inaccurate.
Swedish: (I love those hats)
Spain: (I love those grenadiers)