Unfortunately it may be that Donald Trump would be best for libertarians in the long-run, even though he isn't much of a libertarian. By cleaning out the deep state and crushing the credibility of the MSM and establishment, we may find a much more clear path to political power in the future.
John Boehner is pro-marijuana. He is a shoe-in for Libertarian POTUS candidate.
Ron Paul if he was 20 years younger.
Adam Kokesh 2020
Very well spoken and has military service so his cutting military stance has umpf. Not a household name but would do well in media interviews.
I don't think he ran in 2016 partly because he didn't want to hurt Rand's chances.
Adam Kokesh 2020
Austin Petersen & Ammon Bundy.
No close ties to the D&R crime syndicate.
Ron Paul if he was 20 years younger.