there is a pretty long list...I will need to find it although if you bothered to do just a little research you would find multiple sources of the list...from honest researchers. No way to discount it if you look at it objectively. And if these people were willing to kill the president, do you think there would be anything to restrain them from murdering many more to try and cover up?
What's likely to happen here is that you're going to present an old chestnut from a conspiracy site and I'm going to come back showing that these alleged suspicious deaths weren't so suspicious at all.