Years ago I saw a webpage that had the top kill list for characters in movies. John/Coburn in 'Giù La Testa' was high on this list. No clue how they counted those solders wasted when the bridge was blown up. Freeze, take a screenshot and count heads? The webpage doesn't exist anymore, atleast I haven't been able to find it.
If the Revoultion SW's in not taken in count, I'd say Django is the winner. If we take character only, Sartana in 'Light The Fuse... Sartana Is Coming' gets very close to Django.