Here's a few options:
Perforated side panel (<155mm)
Scythe Fuma 2 (probably the best cooler that will fit)
Noctua U12A (confirmed to fit by CM rep, despite being over spec)
Noctua C14S (dual 140mm fans should fit on this without problems)
Widow panel (<153mm)
Arctic Cooling Freezer 33
Noctua U9S
Still a lot of question marks with this case though. If the U12A fits, then the listed clearances are on the conservative side (for the perforated panel, at least). So what else might fit?
Also quite interested to find out exactly how much space there is in the bottom. At one point in the OT review, the case is shown off with a Strix card and 25mm thick fans. That means there's at least 79mm of clearance down there, which is enough to put an AIO under my 5700 XT (with slim fans and enough room to breathe).