I like Weeknd but he's nowhere near the caliber of artist MJ was, not even a little bit. MJ got classic songs that are timeless.
Agreed, The Weeknd actually cut his path to MJ greatness when he got into making loft self-centered music. MJ had wide-range music which is difficult to sell and requires a sturdy catalogue to pull off.
You can't just drop an Earth Song if you don't got the resume for it no matter how good it sounds, and The Weeknd has a resume that's counter-world songs which is what MJ is worldwide loved for.
MJ wasn't just talent, he was a citizen of the world willing to empathize with the plights of people far away AKA he embraced the world and the world embraced him. That's the most difficult task to accomplish when you're an artist.
That's also why there's only one 2pac song in the Vatican (Changes), which happens to be a song for all people of all races and places.