okay but does it really matter who it was , whoever it was did something beyond greats i think, what do you think?
Is there a messenger who has done something great that will benefit society for all times?
I cant think of any such thing!
May be someone can show me the right road on this topic? 
Salam,
God set examples through them in Quran, great benefits.
David was granted knowledge how to craft advanced armor during his time....
Salam