this dudes changed the world

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  Thomas Edison electric light and (DC) power supply networks
  
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  Károly Zipernowsky, Ottó Bláthy, Miksa Déri, the ZDB transformer
  
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  William Stanley, Jr., transformers
  
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  Galileo Ferraris, Electrical theory, induction motor
  
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  Nikola Tesla, Practical polyphase (AC) and induction motor designs
  
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  Mikhail Dolivo-Dobrovolsky developed standard 3 phase (AC) systems
  
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  Charles Proteus Steinmetz, AC mathematical theories for engineers
  
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  Oliver Heaviside, developed theoretical models for electric circuits