I'm surprised nobody mentioned good old H. Ross Perot, the Texas billionaire who made Bill Clinton president in 1992. ( https://en.wikipedia.org/wiki/Ross_Perot ) Perot peeled off enough libertarian voters from the Republicans to enable a Democratic victory. It odd looking back at him. He was not a proto-Trump exactly but he ran against the NAFTA free trade agreement in a way that looks a lot like how Trump ran again…
Yang definitely hates Trump. He's not about to put him into power any time soon.
Yang is more about wielding influence on political discussion and trying to move the country away from incumbency than anything else. I really don't foresee anyone building a campaign on the forward party, but I can see a democrat or republican leveraging the forward party's ideas in the right environment to get endorsements from it to win in tight elections.