Name a famous person who got more "popular" when they passed away?

Jesus Christ.

Elvis Presley.

Van Gogh, Leonardo DiVinci, Monet, a lot of painters.

I never once heard of Charlie Kirk until he died

any and every politician EVER

Hitler was able to achieve a remarkable fan-club.

Particularly in countries that he never managed to tour...

Archduke Franz Ferdinand

Vincent Van Gogh

Most of them