I’m surprised that the Greeks weren’t mentioned since they really wre the first to show that heavy infantry with high moral are capable of toppling any force not armed with firearms. They were the example the Roman Armies imitated. And every European Army until guns made it impossible to sustain such forces.
Also, why the Ottomans?
Ask the Mamelukes who fought them at Cairo in 1517 or the Christians who fought them at Kosovo, Nicopolis or Mohács.