As a General, Sulla probably has Marius beat. As a reformer, no way! Marius was the driving force behind the aptly named 'Marian Reforms' which gave Rome a much needed boost in manpower. Yes, perhaps someone else would have came along eventually and done what Marius did, but since Marius accomplished it, he gets the title. I'm sure if Alexander Graham Bell didn't invent the telephone, someone would have done it a few years after, but he's still a great inventor nonetheless because he DID invent it.