I have heard it argued both ways. Does anyone have evidence of the bad versus good things that he’s done? Does one obviously outweigh the other?
I believe the links below might help you understand this topic.
"What Really Happened Between Edison and Tesla?" - answered by /u/khosikulu
I think it's also convenient to link this one: "Was Thomas Edison really the "total dick" that people on the internet make him out to be?" - answered by /u/KrapBag , because it addresses one popular source about this, the Oatmeal comic about Tesla, where people end up making Tesla a God, and Thomas Edison, the devil. W