I would say Lee. Don't get me wrong, Jiraiya and Tsinade are very passionate and powerful ninja, but Lee's was able to get up when he was unconscious on the floor with severe injuries. Those feats are almost uncomparable to any other person cause he was still fighting even when he was unconscious, meaning that his will to prove himself to others surpassed his conscious being and its restraints, and is literally instilled within his very subconscious. Usually when a person is knocked out, they stop fighting no matter how much they want to keep fighting. The only person to have a similar willpower is Kimmimaro, who was able to control his body on the power of his will alone, despite being so sick that he shouldn't have been able to move at all.