James Clerk Maxwell
His two volume set monumental work "A treatise on electricity and magnetism" (c)1873 has remained hidden in some drawer of the Gravitational Department of Berkeley CA (University of California) for decades. The only copy left ? The successful detection of Gravitational waves by Thorne et.al. was rewarded with the 2017 Nobel Prize of Physics. When glancing through the Gravitation bible https://archive.org/details/GravitationMisnerThorneWheeler and comparing the covered content like introducing e.g. Chapter 4 ELECTROMAGNETISM AND DIFFERENTIAL FORMS Box 4.2 ABSTRACTING A 2-FORM FROM THE CONCEPT OF "HONEYCOMB¬ LIKE STRUCTURE," IN 3-SPACE AND IN SPACETIME with that of Maxwell's 1873 work https://archive.org/details/electricandmagne01maxwrich https://archive.org/details/electricandmagne02maxwrich you know that the Berkeley professors were peeking in Maxwell's 1873 book set all of the time. He probably died premature because of his opinion on the instantaneous nature of E, the electric field, which was opposed by Einstein and the Berkeley professors, who imposed a general speed limit of c. Of course the speed of light was first calculated by Maxwell. In 1962 J.D. Jackson published Classical Electrodynamics 1st ed https://archive.org/details/ClassicalElectrodynamics probably the best book on its subject. It seems however that his first edition contained some inconsistencies in Chapter 11 Special Theory of Relativity, that it took only a few year before J.D. Jackson was berglarized to join Berkeley in order to publish his famous 2nd edition, in which Chapter 11 on Special Theory was totally rewritten https://archive.org/details/ClassicalElectrodynamics2nd .