Michael is a brilliant entertainer (vocalist AND dancer), he's a legend. His innovation and passion is remarkable and timeless.

Though, like someone mentioned earlier, "the best" is subjective since everyone has a different criteria.

I prefer Ghosts to Thrillers. You rock my world was also just superb. Super funky and forces you to dance no matter what mood you're in. The world is going to miss his innovative mind, he brought so much to the music world, even through his sometimes strange regular metamorphises.