So obviously not to everyone’s taste but if you have access to iCloud+ email, your mail isn’t scanned for sale (as per their US privacy agreement anyway), you get randomized email addresses available to give to places that you think might be spammy and you can link a domain to your account, although you’re only allowed 3 email boxes per user in your family per domain. Works well for me so far. Mind you because of photo storage size and devices backups I’m up to $3/ month from the original $1/month when I started.
Plus with Advanced Data Protection a lot of iCloud info is E2E encrypted. (Not email tho.)
BitWarden provides some encrypted storage on their paid tiers. I think it’s very small, like 1GB, but it’s E2E.
Apple iCloud storage is actually E2E too if you turn on Advanced Data Protection. (Note that not all iCloud features are E2E, like email, for example.) And the price is pretty comparable too. Naturally this works a lot better if you’re on a Mac, but just FYI.