I want to sell my Xbox one I also have games installed without a CD. Do I have to delete my account now if I give it to the new owner because my email address is on it?
Would be highly recommended. I would completely reset the console.
As for what happens to the games, they stay on the console because I specified them that way
You can easily reset the console to factory settings in the settings. Because he gets your profile displayed and can possibly log in.
No, the games will be uninstalled, but they will remain on the account because you bought them. If you buy another xbox and log in with your profile, you can still download it
If you have sold them "with games", the buyer may need your login details. I don't know how it works with the XBox.
So it means better to restore the Xbox and only sell the games where I have a CD