Eventually you need some type of hardware to create your wallet and therefore seed.

Using HW devices (air-gapped) provides a secure way to do this. With an added bonus if you use a great amount of entropy and verified that some of aspect of the device are not compromised. You will be good.

You could further add to your security by adding multisig from different vendors, including the ESP32 modules.

True. Paranoia is a good thing, but not so much that you shoot yourself on the foot.

Great post btw.