This man has been using his content to drive people to the steem blockchain. He has over 193k subscribers.
https://www.youtube.com/channel/UCxODjeUwZHk3p-7TU-IsDOA
steemit username: https://steemit.com/@boxmining
@Rok-sivante has been a man who has put smiles in the heart of so many steemians, it will be bad not nominating him. He is very supportive, in fact, he singlehandedly solved my problem back then. He is full of love for the steem blockchain and ready to take to an apex height. One thing I love about him is that after the support, he will always tell you to pay it forward i.e, do same to others and never ask for anything in return.
When you talking of prominent people who have impacted and who are still impacting to the steem blockchain without thinking of what they will get in return, am going to mention @roundbeargames. This dude has been supportive to those steemians he has come across with. If you engage fairly with his post, there is some reward he dishes out at the end. He is simply a cool guy and is after seeing steem grows. He actually owns a YouTube channel where he talked about Steem and the game he is developing.
You can check that here
Boxmining says STEEM is shit.