Joseph Smith had a much stronger claim, but still falls short. So no (not Jesus 2)
Joseph Smith is a false prophet who changed the Gospel and preached another gospel, a false gospel. He didn't teach the truth, and the fullest and most precise example of this is his claim that 'God commanded him to partake in polygamy.' When Jesus said, 'It is finished,' that meant
Isaiah 42:4
King James Version
4 He shall not fail nor be discouraged, till he have set judgment in the earth: and the isles shall wait for his law.
Jesus 'absolutely' completed the work of God. He did 100% and a PERFECT job. How is some false prophet going to come along and say that God commanded Him to break Jesus' New Testament commandments, which was SEALED with PERFECT blood?
Matthew 19:3-9
King James Version
3 The Pharisees also came unto him, tempting him, and saying unto him, Is it lawful for a man to put away his wife for every cause?
4 And he answered and said unto them, Have ye not read, that he which made them at the beginning made them male and female,
5 And said, For this cause shall a man leave father and mother, and shall cleave to his wife: and they twain shall be one flesh?
6 Wherefore they are no more twain, but one flesh. What therefore God hath joined together, let not man put asunder.
Very clear. I am not saying this to condemn anybody. I am saying this to show that Joseph Smith IS a FALSE prophet. Not a true teacher & practicer of righteousness in Jesus Christ. If you have broken Jesus' commandments, He will forgive you. I suppose it is different to TEACH apostasy.