Hmm..well, only thing that comes close is Victoria.
Trading is necessary,as many things require different resources and commodities, and prices are effected by supply and demand.
You can sell, or buy. This also effects the eonomy of your country.
You can set taxes, and tarifs, defense,education,crime fighting,social security budget, and even social rights, like working hours and healthcare, and pension etc.
You can also research techs,that effect your military and economy, and culture and trade for them.
You have to manage production of goods, and you can build factories/railways(that make production more efficient),resource extracting "units" like mines and timber lodges and expand them, or let the capitalists do it for you, as long as you have the taxing of rich set to near nill. You also have to manage work force,by educating or training them, which costs commodities, and having low taxes and jobs opportunities make your country's populace grow, thanks to those nice immigrants.
I would call it rather complex.
And you can still wage war. Which is effected by technological advances like the growth of firepower in the late 1890s and early 19th century.