This is what happened to every single joestar in jojos bizarre adventure
Starting off with jonathan joestar Jonathan Joestar died on a burning ship after fighting with dio, mortally wounded in the neck by Dio Brando’s eye lasers, then passed away while holding Dio's severed head and ultimately forgiving dio
Next up is joseph joestar he survived battles against Pillar Men and DIO became a wealthy real estate tycoon and lived to an old age it is never confirmed if he died after part four