The matter lies not with Napoleon, but with Louis XIV. If he had been more successful, we could have seen the entirety of Spain and her territories in the French sphere. Had he gotten what he wanted, though this might be a stretch, the Dutch Republic would surely have beeen annexed, as well as parts of the Hole Roman Empire. Parts of Italy are also possible. Granted, he wouldn't have gotten an empire as large as Napoleon did, but the fact of the matter is, had he gotten what he desired, assuming the French Revolution and subsequent events still go as they did in OTL, Napoleon would have started out with a bigger empire, and thus, less of a challenge in creating one from the historical France.