Cooler Size and Clearance Comparison
This list is some,but by no means all, top coolers and their sizes. There are at least twice as many as in this list. More will be added as I squire and measure them.
Several like Cryorig R1 Ultimate & Universal, all Macho and HE-1 are off-center to the rear giving better RAM clearance. Others like Silver Arrow SB-E & IBE, NH-D15S, HR-22, TRUE Spirit 140 BW Rev. A, etc. are offset for better PCIe socket clearance. Many of the big single tower coolers are just as good as the twin towres. For example TRUE Spirit 140 Power as good as NH-D14 (and quieter) .. as are NH-U14S, Archon and Le Grand Macho (w/ fan).
If you notice any errors, please let me know.