GrreatTeacher: https://en.wikipedia.org/wiki/Nikola_Tesla#Death -- the government seized his work because even then they thought he might have created something incredible that they needed to know about, but they didn't find anything novel (the conspiracy theorists will say that they took his death ray, though, and I suppose they are keeping it in a warehouse for a rainy day).
I have to say, he was a smart guy, but nowhere near the demi-god people make him out to be. A fairly good summary of his shortcomings in accepting modern science is listed here: https://en.wikipedia.org/wiki/Nikola_Tesla#Views_on_experimental_and_theoretical_physics. I seem to recall that he thought that what scientists observed as nuclear energy was actually electrical energy emitted from the sun and bouncing off atoms.
He was very ambitious and I think his wireless power concept was ahead of its time. Scientists have it working now over short distances, though, and we will probably have some real-world applications of the tech soon. That being said, I'm not sure how I feel about being enveloped in electrical fields constantly. I have too much firsthand experience with strong electrical fields already, and know what they can do to the body.