https://www.nbcnews.com/news/us-news/david-koch-billionaire-conservative-activist-philanthropist-dies-79-n1045696
He was never fairly judged by the left in my opinion - largely because of his massive stance against climate change data. But the complete picture showed alot more: he was a very generours donor to medical research, education, and several liberal causes like stem-cell research and advocacy for pro-choice and drug legalization.
he was a legitimate free thinker not bound by the tribal parameters our propoganda likes to pigeon hole us into. In that sense he was a very admiral person. RIP