FYI, Jesse Ventura vote for Jill Stein in 2016, and has considered running for President on the Green Party ticket in 2020. Even without those facts, he'd never be the leader of any libertarian party.
1.Libertarian
2.Liberal (but only if they aren't as anti-gun as I suspect they'd be in your universe, I would hope an actual American Liberal party would be pro-gun, or at least not make guns a part of the platform one way or the other)
I couldn't vote for any of the rest for various freedom and liberty reasons.
That certainly won't happen. In a parliamentary Europe, a liberal party will be anti-gun. They're neoliberal bought out by corporates.
but this is in America, we like guns. Even some left leaning types. If we got this many parties, at least one of the left leaning ones won't be anti-gun (they wouldn't necessarily be pro-gun either), it seems like the liberals would be the best fit.