Who's successfully spreading the message of liberty?

There are several with considerable audiences, but how many are successfully spreading the message of liberty to people who are not already convinced?  That means not just preaching to the choir, but growing their audience by reaching people who are not already libertarians/anarchists/voluntaryists. 

Here are four that I enjoy often. 

Dave Smith

Dave is a professional comedian. He and his crew have been having great, in-depth discussions, with plenty of irreverence and humour, on his Part of the Problem podcast. He goes deeper to the philosophical roots of libertarian ideas than many others I've watched.  I see real potential here. 

Jason Stapleton

Jason was in the US marines and then became a successful currency trader and later teacher to currency traders. He has a down-to-earth manner that I think can resonate with many ordinary folks. He goes deep into important topics from the news, with a focus on economics. 

Tom Woods

Tom is an historian and successful author who interviews all sorts of people about economic, political, social and all manner of topics on his Show. He also does a great deal through his Liberty Classroom and speaking engagements.  I have learned so much from Tom, and really appreciate his show. I think he does reach out with some success, although I suspect he'll be more appreciated by those of us who are already convinced of the importance of individual liberty. 

Jeff Berwick

Famous among an-caps for his Anarchast and Dollar Vigilante podcasts, Jeff made quite a splash here when he joined Steemit. I very much enjoy his interviews and shows! However, lots of people are probably scared off by the name "Anarchast", which is of course their loss. I would not want Jeff to tone down or modify his message. I just think that he may be too hard-core for outreach to the masses. 

Any other suggestions? 

Who do you think is the most effective at spreading the ideas of liberty?