I know about that... that you have to take the screws out of the motherboard socket and Intel has stated it will void the warranty. Not the answer.
How Intel will be able to tell you used a different bracket to secure the CPU? Not like you'll send the motherboard in case of RMA.
The warping issue I believe is random. So far, I haven't noticed a particular Manufacturer/model which is prone to warping.
MSI Z690 Tomahawk DDR4, either Noctua ND-H15S or EK 360 Basic, no issues, also no warping here.
The easiest solution would be the nylon spacers, but that would also interfere with warranty, under Intel claims.
My advice is to get the CPU + Motherboard you want and install it as it should. Keep the original invoices. If problem happens, go after them.
No reason to worry too much for something that may or may not happen.
But if you want to avoid any chance of this issue, the only option would be going AMD, which is a bad move now as won't be much to upgrade to under AM4 socket.