AngryAnt

If I need to order something for import to solve the problem, that is fine - not getting this for my personal setup. I just need to know what I can reasonably expect to be a tangible improvement on the current situation.

So something is clearly off on the CPU cooler clearance measurement - there is *plenty* of space for it - even with the fan offset for ram clearance.
 
The default Corsair fans are stupid loud and getting replaced and the HHD trays just failed to relay signal, but otherwise it's been a very nice experience.

Since you've already got the best fans on the market, I'd go with the metal-paneled C unless you would want to do water cooling in the future, in which case the PM01 is stupidly versatile.

I recommend the PM01 and to pay attention to this video. Toss one of your 120s in the top rearmost slot. I'd say the RL06 and to flip out the front fans for your 120s but your CPU cooler is too big.
 
 
 
Addendum - Or you could grab a Meshify C, flip out the front fans for your 120s, and place one of the removed fans in the top rear slot since fully populated with fans in the front the C is almost as good as the PM01 or RL06.

Tadaa! Turns out I was looking at the wrong version number. "2.20.1271" appears to be the version of the BIOS UI (I was looking at the last bit of it, 1271, and reading that as the bios version - clearly a later build than 1201) - not the actual BIOS.
 
The actual BIOS version number is 0807 x64 (build date Aug 07 2019). I'll run a backup of it and give 1201 a try.

Have you tried updating bios? https://www.asus.com/Motherboards/ROG-Strix-X570-F-Gaming/HelpDesk_BIOS/