The history of invention, and perhaps the history of technology in general, has often been heroic. Just like films where a single hero defeats an alien invasion of earth, a single hero has often been given credit for an immediate invention or technological advance in a quick flash of inspiration and insight; as opposed to a team of people toiling away through mistakes and false leads for years of development, which is more typical. Edison was indeed capable of insights and inspiration on his own- for example, between 1872-76 he figured a way in which a single telegraph wire could carry several messages simultaneously- an incredibly important advance for everything from running a railroad to transatlantic communications. But he would also assemble a team in his laboratory/shop, and with that workforce was able to undertake the invention of a lot things that required lots of iterative testing and experiment- like moving pictures and workable lightbulbs ( yes, lightbulbs previously consumed lots of current and didn't last very long). Tesla is much more what people would like an inventor to be- a colorful, eccentric genius, working with less assistance.

Heroic narratives also tend to require a villain. There's a good answer here by u/khosikulu as to the truth of what Edison did to Tesla. To explain Tesla's failure, it's much more satisfying to claim Edison did him dirty than to admit Tesla received both significant investment and attention in his own time and was not a very good manager of either. And if Tesla had his share of business success, Edison had his share of business failures. DC current generation did turn out to be a dead-end for the 19th c. electrical grid, but Edison had others- like taconite mining and concrete furniture. The first failed because he did not understand the costs involved in such a capital-heavy venture, the second failed likely because Edison was an odd guy, and was rather clueless about human beings and what they would buy (he might have benefitted from a focus group, if that had been invented).

Once made into a villain, endowed with a team of loyal assistants and perhaps world-wide reach, it is only a short leap of the imagination to make Edison also the murderer of Louis Le Prince. I have not dug into this story much- perhaps someone else here has- but the timeline would seem to have required Edison having spies in France to tell him that Le Prince's work was already a threat; Le Prince had not applied for a patent, and an unpatented invention was only possibly a commercial threat, not a legal one. It would also require Edison to have had a team of assassins to do the job. Yes, it's fun to think of Edison, perhaps dressed in black, rubbing his hands and telegraphing instructions to a team of hired apaches in Paris ( I can see the poster for the film in my mind right now). But there's no actual evidence as to how Le Prince died, and some real facts would be needed in order to make Edison his murderer.

Morris, E. (2020). Edison. Random House Trade Paperbacks.

Cheney, M. (2001). Tesla: Man Out of Time (1st ed.). Touchstone.

As for the Edison's role in the development of the lightbulb (or rather lack thereof), I have mentioned it in a short entry concerning the history of the device itself. Please note, however, that this is more an issue of the popular knowledge and journalism rather than of Edison himself, who was a proficient inventor and entrepreneur in his own right.