Is Jesus a moral exemplar?

Not as much as people would wish. Even if we simply evaluate the story of him as it's told, regardless of whether or how much of it is true, he falls short of many other moral heroes. He commands people to hate (Luke 14:26), engages in physical violence (John 2:15), teaches awful things (Matthew 5:28, Mark 3:29, etc.), damns innocents to hell (Mark 16:16), and fails to condemn slavery or champion democracy or education or political rights for women. Just for example.

See On Jesus as a Philosopher and The Example of Musonius Rufus.