I don’t know who some of those were but Tom Horn was a killer and was probably guilty of killing the 14 year old kid and deserved to be hanged.
They didn’t even mention the most efficient gunman of them all, John Wesley Hardin.
I forgot about Tom Horn.
I think it was Clay Allison who said, “I didn’t want to send a man to hell on an empty stomach.”
Hardin was a ruthless killer but he shot a lot of people who couldn’t fight back.
Did he ever kill some one face to face without help.
I wouldn't call him a "gunslinger". He generally killed from ambush with a rifle.