I say do a report on Hitler. I know from my experience in public education that the opinions of him that most people hold are extremely ignorant and know next to nothing about him.
If you want someone interesting, I got one name for you;
Nikola Tesla.
He may be the most amazing person I've ever read about. An inventor who actually invented half the crap we use everyday. AC electricity, the principles behind TV, radio, telephone, remote control, hydroelectricty, etc. Ever played Command and Conquer and used the Tesla coils? Yep, he actually invented them, and then invented a way to use harmonic resonance to split the world in half. He also developed theories on matter, electricity, and all sorts of stuff that only now, nearly a century later, do we have the technology to realize he was right.
He didn't influence a specific historical event; he influenced everything.