Which privacy app should I use?

Hi, I use several different apps for maintaining privacy and having a better Windows experience.
The Apps are: W10Privacy, Blackbird, OOShutUp10++

I don't want much conflicts between settings but I also don't want Microsoft calling home. Should I use all three — or only one of them?

Use only one i would only use OOShutUp10++.

Cause of modifications to Windows Update dependencies - disabling certain features (disabled by apps like above) - can cause Win Updates to fail. Thus, can't recommend them anymore.

A better option - would be a firewall with custom rules (not automated - you should handle the blocking by choice, based on needs and usage - like WFC - rather lite weight since it's a better UI for Windows Firewall) + a port limiter/blocker like Portmaster This works better than any of above privacy apps - at blocking unwanted connection (be it from Microsoft/Windows or any other app). Even when it comes to Windows Updates - if done manually, this option works best.

If you're using Windows Defender - then DefenderUI - is also useful, gives you more control - a simple way to access and set most Windows Defender features.