Best custom ROM or eliminate bloatware and privacy?

I just purchased a used G3 (D852) and am in the process of setting it up.

From my research, I know it comes with a lot of bloatware and I wouldn't mind getting rid of it. I am also a fan of privacy, so I found a way to access the "Access Lock" feature (aka App Ops and similar to Privacy Guard)but I found that apps that come as bloatware, Facebook for example, don't appear in the "Access Lock" list, so I can't change permissions on them. It looks like mostly apps that have been installed from the Play Store can have their permissions changed by "Access Lock".

I prefer not to root my device, but if I had to, I would consider it.

If I installed a custom ROM, which ROM would give me the following?
-4K camera (preferably the stock LG camera app)
-Privacy Guard (or similar)
-Not rooted

I don't mind the stock ROM, but I would like to have permission control over all apps, specially Facebook and some of the Google apps. Also, I would like to get rid of the bloatware.

Does someone have a suggestion for me?

Thanks!