I put Google as the worst. They started as a search engine and making revenue from advertising. Which isn't so bad.
They expanded into email, which seemed a reasonable way to get more advertising revenue.
Then they bought online media through Youtube, which was great for their strength in content delivery, and provided more vehicles for ad revenue.
But somewhere they stopped saying "don't be evil" and now they link your accounts in all the services they acquire, track your dns lookups, your searches, your phonecalls, your contacts, your webpages (through fonts), your map searches, your every location through traffic, they converted your email address into a social media profile which they track as ruthlessly and lucratively as Facebook ever did... They even photograph your home, document your wifi access points etc, etc.
At least Facebook never pretended to be anything other than an ad-based social media company.