Famous People, Tragic Deaths?

[eee]

I'm making a short video tribute to some important who died tragically. I wanted to use Princess Diana but I can't. I also can't use John Lennon. I don't want to use Elvis or musicians. I want to use some who did something important for people how Princess Diana did. If anyone knows someone that has an abundance of clips (maybe there was a biography on them) on youtube, I would love some suggestions.