Admittedly each ones’ use case and needs are different. So apparently you are using more of Google’s services than the pure search engine or mail account.
Personally, I am left with a couple of old Gmail accounts that I am using very rarely. One of them only for an Android phone which is mostly in the drawer. It is used only for some apps that I can’t get working on a de-googled device.
There is this thread in the forum for privacy respecting search engines:
For email providers:
Alternative to Youtube:
But maybe they won’t get you the coverage you might need.