If I were to divide large tech companies between "good" and "bad", the only one I would classify as "bad" is Facebook. Most are neutral-to-good. Facebook has a huge societal and human cost and has hardly any benefits to show for it (unlike, say, fossil energy companies, which are a threat to civilization but at least serve a useful role by fulfilling our energy needs).

Facebook is a democracy-threatening, attention-wasting, extractive institution, with a deeply unethical leadership. Most tech companies are neutral -- Amazon, Microsoft, Uber etc., I assume they're doing business for profit and not social good, but they do provide value and largely play by the rules. Some other companies I would classify as "good" as they provide considerable value to society as a by-product of doing business, like Apple and Google (disclaimer: I work for Google, and I am quite happy about that).

Facebook is the only large tech company I can think of that is just plain evil. There's no other like it. It's in a league of its own.