This is quite a remarkable idea for a post, and it's good to find out what everyone on here thinks of as their go to accounts for support and being...well Hero's I suppose. My personal choices, @enginewitty for the tireless amount of work he does not only supporting and growing his own #thealliance community but also how much he interacts in every single Discord even and show - you can guarantee he is there whatever is going on.
@sircork whose work with #youarehope is incredible bringing support to some of the most needy regions of the world through the Blockchain.
@shadowspub - Truly a bastion of the people, supporting every account from the smallest on Steemit and offering everyone the chance to showcase their work through Pimp My Post Thursdays. SteemitRamble discord offers many social events and is always very interactive - it is the place to be seen and get your work noticed.
I have tons more, but you said three and right now they are might top three Hero's of Steemit - solid gold Kind hearted people who will do anything to help others even if it costs them to do it.
RE: Who are the heroes on steemit? (5SBD contest)