I had a similar situation where I lost my brother very unexpectedly. I ended up having to run a password cracker on his windows account because nobody had a recovery email. Thankfully his windows credentials were not very strong and his gaming GPU was able to crack the password in a few days using a Linux livecd, and I was able to expand from there into his 1Password account. Like you, I realized that having a trusted second party with the keys to my digital kingdom would be a wise choice in case of a disaster.