The fact that Edison is pervasively over-credited is really another example of the highly visible executive claiming personal credit for the labors of employees.

Two others who come to mind are https://en.wikipedia.org/wiki/Charles_Proteus_Steinmetz and https://en.wikipedia.org/wiki/Charles_F._Scott_(engineer)

Steinmetz contributed heavily to AC systems theory which helped understand and expand transmission. while Scott contributed a lot to transformer theory and design (I have to find his Transformer book.)