Without demeaning or deriding anyone or their achievements:
It may have been the author (Fuller) who said that Alexander fought an oriental mob.
Alexander's achievements lasted for his lifetime. Caesar's achievements (no matter how flawed their execution), have lasted to this day. (Augustus', also.) Who else may that be said of? If his raids into Britain were a failure, then they set the stage for its eventual conquest. Caesar's military campaigns are studied in every military school today. After all is said and done, the question to be answered is: would the West, and indeed the World, be as it is today, except for Caesar and Augustus?
Scoundrels, who only achieve infamy, such as Brutus, generally don't murder their own ilk; it is usually their betters as their motive is profit and/or the enrichment of their class. Gavrillo Princeps murdered Archduke Ferdinand for the freedom of Serbia and not to fill his pockets.
I believe that it was Fuller who held that Scipio Africanus was the Greatest Captain in History. Again, had it not been for Scipio, would the world be as it is today?
My opinion only.