His Hand in the Assassin’s Order
The expansion of the Order largely comes down to Ezio. Having turned a number of Rome’s citizens into Assassin apprentices and reforming those who had previously betrayed the Order, Ezio helps to expand the Order’s reach across Europe and even into India. This brotherhood that Ezio began to form in Rome helped to combat the influence of the Borgia family and the Papacy itself. Of course, Ezio went on to become the Mentor of the Order, succeeding Niccolo, who said Ezio was exactly what the Order needed.
His role in securing and expanding the Order continued upon his arrival in Constantinople. Having learned that the Templars had taken over Byzantine remnants and overthrow the Ottomans, Ezio retook all of the Assassin Dens and trained seven recruits to the rank of Master Assassins to protect each den. From here, the assassins managed to spread their influence across other cities across Europe and the Middle East, reducing Templar control and rebuilding the cities.
Now if you’re gonna tell me that any of the other assassins is better than Ezio, they better have a pretty impressive resume.