Siddharta Gautama (Shakyamuni)

Shakyamuni is the attested founder of Buddhism according to the Buddhacarita.  Although his final life was not one of warfare, Siddharta was trained in the ways of war as a prince.  After his miraculous birth, the hermit Asita pronounced that Shakyamuni would be either a great king or a great spiritual leader.  His father began training him in all the necessary skills for a king, political and martial.

One such showing of his martial capability was in the contest to marry Yasodhara.  He was commanded to fire an arrow through a tree.  Not only did the arrow pierce the tree, it passed through six subsequent trees and killed a boar on the far side.
His final life as Shakyamuni is devoted to peace, but his former birth stories, the Jatakas, provide tales of his valor, compassion, and virtue.  For a greater appreciation of his standing as hero and historic figure, those are recommended.

Readings:  Buddhacarita