Huh?
You repeated over and over that you are looking at power plants in this thread.
In terms of people killed from power generation:
Coal far and away beats anything else in terms of people dead.
I suspect oil is right in there with coal.
Hydro I would call as second.
After that I think the numbers become so small they are barely worth noting in the big scheme of things.
Nuclear power plant deaths are vanishingly small in the scheme of things. 4,000 for Chernobyl and that is a standout. Nothing else comes close from nuclear power plants.