What are the best top roman emperors of all time? Rank them all with this top roman emperors of all time tier list maker. Drag your favorites into S tier and drop the worst into D tier. Share your top roman emperors of all time tier list on social media, compare rankings with friends, and see what other Americans think. The ultimate way to rank and debate top roman emperors of all time online. Popular categories include history, ancient-history, roman-empire, emperors.