When prior to 1798 do you want him dead? This is extremely relevant considering that Napoleon's skills were instrumental in giving France a victory in their 1796 Italian campaign. Without that, there's no telling how long it would take to bring Austria to the peace table, if it happened at all.
That said, I'm pretty sure that France would win the War of the Second Coalition even without Nappy, since the decisive blows in that conflict came in Switzerland and the Netherlands and didn't require his help. After that was Napoleon's coup so it gets really fuzzy.
As far as foreign policy, I don't think France would be able to avoid repeated wars with its neighbors; as I understand it, the creation of the Batavian Republic in Amsterdam was pretty much guaranteed after the Dutch lost the Fourth Anglo-Dutch War, so there's no chance to butterfly that. As such, the menace of Republicanism will be seen as too urgent for the major European powers to ignore, especially Britain. Borders would look like OTL post-Second Coalition borders after the Second Coalition fails, but again, it gets iffy after the date of the OTL Napoleonic power grab.
All I've got, really, since I don't know who'd be liable to take charge in the absence of Napoleon.