1. Miners are workers who are getting paid to do a job. Their job provides bitcoin with security but they are still employees.
2. Influencers are jokes. Majority of them are idiots who don't even understand the topic they so actively talk about.
3. CEXes are just businesses here to make money, they aren't contributing to anything.
4. It depends on the user. Purely using bitcoin is not contributing to anything.
6. (5?) As @mk4 said, devs and those who educate people.