Charlie,
Napoleon wouldn't be top of my list either; but the Napoleonic wars were no different to any other imperialist war; it was those who made the greatest sacrifice who had the least to gain. As the song says
"And we have bigger tyrants with Boneys of our own".
There were as many songs expressing if not support, at least an ambivalence towards Napoleon, and most of the songs in support of Nelson remained on the printed page and never made it to the tradition.
A large number of ordinary seamen who fought at Trafalgar were impressed men; they returned to the enclosures, the poaching wars, transportation and Peterloo, just as those who returned from the trenches were met with the Great Depression.
For me, the people in Ireland who said "neither English nor Irish landlord" had the right idea.
Jim Carroll