Olinto De Preto?
Here is a link.
https://isidore.co/misc/Physics%20papers%20and%20books/Cosmology/Copernican%20principle/Sungenis%20&%20De%20Lano/E-equals-mc2-Not-Einsteins-Invention.pdf
But that was only one of many that he plagiarized. There is a quite substantial list in the sound clip.
Tesla made a big point of denouncing Einstein.
A hundred prestigious Austrian and German scientists publicly denounced him.