Mimmo Palmara as Commodus in TWO GLADIATORS
Enzo Tarascio was Commodus in SWORD OF THE EMPIRE; like FALL OF ROMAN EMPIRE, this film "influenced" GLADIATOR (2000).
Joaquin Phoenix in GLADIATOR (2000). Joaquin was nominated for best supporting actor for his interpretation of Commodus. As good as it was Joaquin is probably the farthest removed from the real thing.