If teams from different eras or seasons could face off, what would be your ultimate match-up?

I would like to see Mike Tyson in his prime fight Muhammed Ali at his best (pre-suspension/draft issue, I suppose). I just think of the power and force Tyson brought to the ring before he fell apart and that he would just overcome Ali’s cunning and quickness… but Ali beat Foreman when Foreman seemed unbeatable and Ali was probably past his peak by that time. Two great contrasts in style.