Mentioned in this thread, and coming September from Universal in R1, Philip Kaufman's The Great Northfield Minnesota Raid. And R2 fans will be happy - that Columbia / DDHE deal just gets better and better - the BBFC has certified the Budd Boetticher / Randolph Scott western Decision at...
The Hanging Tree has been released in France by Warners (as La Colline Des Potences); and a dismal effort it is too, see here. I can only hope the hold up in R1 involves Warners searching for a decent print to transfer in OAR.
Nice list; off the top of my head I'd add Fritz Lang's superior sequel The Return of Frank James, Sam Fuller's Run of The Arrow and Richard Brooks' The Last Hunt.