UPDATED -- I want answers (It's Alexander the Great; see comments)

A follow up to my original post asking for help identifying this guy:

Unidentified bust in Rome's Aurelian wall on the Via Campagna caddycorner from the Hotel Victoria Roma.

The possibilities that I put forth were, since he is in the Aurelian Wall, like, the Emperor Aurelian (duh!), along with Alexander the Great, the Eastern Roman general Belisarius, and the Renaissance artist Raphael.
Read more »