Actually I'd deny Edison the electric light because he was never the first or even the 10th person to demonstrate the technology & he purchased several patents from others on his way to his "invention" . I will give him that he commercialised an integrated power distribution & lighting system (although it was DC).

Going back to the phonograph, that he perhaps was the first. I used that as a demonstration of the absurdity of calling Farnsworth the inventor of television when he clearly was not the 1st, given that his idea had more legs.