What unicorn candidate do you prefer?
Teddy Roosevelt circa 1910-1919 with a 2.0 upgrade to update his perspective and integrate the national and global occurrences of the last century,...as that unicorn doesn't appear stage-ready (you did request my preference), I'm uncertain at this time. I'm not comfortable with, or excited about, any of the announced Democratic, Republican or Independent candidates.
I don't know much about the following candidates, but am interested in investigating them further to see if they have policy positions and a history of fighting for them which could lead to my support for them:
Pete Buttigieg mayor of South Bend
https://www.peteforamerica.com/meet-pete/
Andrew Yang
https://www.yang2020.com/policies/
So far, that's about as far as my "unknown" candidates list has gotten, but I'm open to consideration of others (Republican, Independent, or Democratic) so long as I am convinced that they offer an evidence-based policy agenda towards a Progressive future in America.
As for the announced candidates who I feel I know enough about to offer tentative support at this time that would be pretty much limited to
Tulsi Gabbard and Elizabeth Warren (so far), both of whom I have more than a few reservations concerning. That said, I would probably be able to do a nose-hold and vote for either with what I know about them right now, if it came down to that. If
Sanders throws his hat in the ring, he would probably be a front-runner on my list, but he also has problems to overcome before I could enthusiastically support him. I'm still exploring the field, and if anyone has any suggestions, please let me know, I try to stay open at this point in such races. I'm primarily policy driven when it comes to how I exercise my votes for legislative representation and executive sponsorship.