The other black-powder war that deserves some consideration would be the Seven Years' War--perhaps the height of linear tactics (as strictly defined), fought across perhaps the second-greatest geographic extent of any war.
My preferences also depend on whether the large-battle system (or campaign generally) could be made more dynamic. Leipzig with a UGG-style set of dependent scenarios could be amazing; Leipzig with a UGCW-style railroaded progression an exercise in frustration. Moreover, both Napoleon and Frederick were masters of the campaign as much, if not more, than of the battlefield--seeking favorable engagements, keeping superior forces divided and defeating them in detail, etc. Extending play to the campaign map would make a huge difference to either the Seven Years' or Napoleonic wars. Conversely, if we are stuck with UGCW-style scripting, a war that featured smaller battles (to mitigate immersion-breaking scripting) and more pitched battles (to reduce regret at not having a campaign map) would seem more attractive.