Sentence:  At the head of it rode two men—one with a quiet mesmeric power that bred perfect trust at sight, the other with a kindling power of enthusiasm, and a passionate energy, mental, physical, emotional, that was tireless; each a <WSD>man among men</WSD>, and both together an ideal leader for the thousand Americans at their heels. 
Meaning of the word marked with <WSD> tags:  A superior or remarkable man who stands out from other men; a leader or exemplar for other men.