Well I would go with Spartan Warrior…they actually make a show called the Deadliest Warrior , and they had experts and scientists running tests and computer simulations. The spartan beat all of them, his shield was the killer. Now let me clarify there are two types of warriors, ancient warriors and modern day warriors. Ancients did not have guns, so Spartans won against, Samurai, Ninja, Knights, Roman Legionnaires, Barbarians, and some ancients African warriors. Nothing could penetrate the Spartan shield and it was also a formidable weapon, it was entirely too big and the spartans whole body could get behind it. Aside from weapons Spartans were brought up from birth to eat, sleep and breathe combat..so that played a huge factor in it.
Here were the match ups:
Gladiator vs. Apache (winner Apache)
Viking vs Samurai (winner Samurai)
Spartan vs Ninja (winner Spartan)
Pirate vs Knight (winner Pirate)
Yakuza vs Mafia (winner Yakuza)
Green Beret vs Spetznaz (winner green Beret)
Shaolin Monk vs. Maori (winner Shaolin Monk)
William Wallace vs Shaka Zulu (winner William Wallace)
IRA vs Taliban (winner Taliban)
SWAT vs. GSG 9 (winner SWAT)
Attila the Hun vs. Alexander the Great (winner Attila the Hun)
Jesse James Gang vs. Al Capone Gang (winner Al Capone)
Aztec Jaguar vs. Zande Warrior (winner Zande Warrior)
Nazi Waffen SS vs. Viet Cong (winner Viet Cong)
Roman Centurion vs. Rajput Warrior (winner Roman Centurion)
Somali Pirate vs. Medellin Cartel (winner Somali Pirate)
Persian Immortal vs. Celt (winner Persian Immortal)
KGB vs. CIA (winner CIA)
Vlad the Impaler vs. Sun Tzu (winner Vlad the Impaler)
Ming Warrior vs. Musketeer (winner Muskateer)
Comanche vs. Mongol (winner Comanche)
Navy Seal vs. Israeli Commando (winner Navy Seal)
all these were run through a computer simulation 1000 times
The top two ancient warriors were Samurai and Spartan…they put them together and Spartan won.