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For Search I use Duckduckgo (free).
For Mail, Calendar and Contacts I use Fastmail (free or paid, I use the paid version).
For file storage there's plenty of alternatives (Dropbox etc.)
For browser I use Edge, but it is also built on Chromium. I will make my choice once the recent Web Environment Integrity topic has become more clear.
Why do you use Edge over Firefox?
You're free to do whatever you want, but I think it's important to be informed and reading your comment about Edge I thought I might clarify: The reason WEI is a problem is because of Chrom(e)(ium)'s sheer market share. If it's easy for websites to assume a non-attested browser is a bot or a small minority of privacy-minded people they will simply not serve those.
Basically I'm saying by staying with your current browser you're helping Google push this through.
But again, you're free to do whatever you think is right for you.