Question:Can a person live a completely sinless life and enter Heaven without Jesus?
The question is pure speculation since God has said, "all have sinned and fall short of the glory of God" (Romans 3:23). One point of Jesus' coming to earth was to prove that a sinless life was not completely impossible. The answer to the question, "If there is no inherited sin, then wouldn't this leave a possibility for a person to live a sinless life?" address this point.
Since no one is without sin, no one can enter heaven without Jesus. "Nor is there salvation in any other, for there is no other name under heaven given among men by which we must be saved" (Acts 4:12). A sinless person has nothing from which he needs saving. But we have all sinned, so we all need saving, and the only path to salvation is by Jesus who was our perfect sacrifice because he lived without sin.