I will reiterate what i said earlier: Spain is obvious, but after Spain, the rest of the anglo-Saxon world is just variations on a theme.

I vote for Ottoman/Barbary states. Lets get a bit of variety in there.

Or better still, here is a quiz question. In 1800, which Nation had the third largest Navy in the world, after the UK and France?
Spain? USA? netherlands?

Nope.
Russia.