You can add Ruark to the list of alcoholic writers, but then Hemmingway was his idol. Milek was fond of his hooch and O'Conner and Skelton made liberal reference to it. I also believe the latter 3 were quite good at what they did. Writing about guns, shooting and reloading.
John Taylor could be added to the list also, but his claim to fame is really only one book, a really good one.
Keith, he is incomparable. In their writing, O'Conner was fine cognac, brandy, overstuffed leather chairs and leather bound books, Keith was rawhide, barbed wire, mean horses and big rifles. I love nad miss them both.
Vic