Most to gain:
—LBJ—definitely
—Mob—JFK had declared war on them—dumped Carlos Marcello in the Guatemala jungle—Marcello returns and is caught on a FBI wiretap saying “get that stone out of my shoe”
—Israel—JFK was fanatically anti-proliferation—another term and eight years of Bobby and this could be a nation killer for Israel
—CIA and former CIA—long list—JFK was threatening to break them into a thousand pieces—Bay of Pigs debacle, firing of Dulles and his deputy, JFK had affair with wife of London Chief of Station and killed their marriage, James Angleton working with Israel on bomb in secret etc etc etc...
JFK had a unique ability to make very powerful enemies.
It was a “Murder on the Orient Express” situation.
You forgot Cuba.
Bobby had had the CIA prepare several assassination attempts against Castro. It’s probable that Castro knew about them.
#6. Walter Cronkite
#6. Walter Cronkite
One of the most powerful of these was the aerospace industry....Hughes Aircraft, for example....