Noctua D15 or D15S - hard to beat the quality
one suggestion on any cooler, a lot of users complain about getting the 2nd screw to catch threads when attaching the cooler. If you compress the spring under the screws, fully compress them, it will shorten the screws uncompressed length slightly just enough to make it a little easier to catch the threads on the 2nd screw (i work with springs)
To give you an idea or example, brand new springs, 17 lb compression value (takes 17 lbs to compress 1 inch), new they're 6" in lenght. Compressed one time fully, they drop to 5.5 inches uncompressed. The springs on the cooler screws are roughly 35-40 lb compression value, and much shorter - so the loss in length will not exceed 1/16th" but will make it easier to install. You'll notice over time, every time you un-install the cooler and re-install it gets easier to catch those threads on that 2nd screw - it compresses the length a little more each time it's installed
fwiw