Churchill was known to be very problematic and his career outside of the war wasn't exactly stellar as he had some dubious opinions: https://www.bbc.co.uk/news/

Churchill was known to be very problematic and his career outside of the war wasn't exactly stellar as he had some dubious opinions: https://www.bbc.co.uk/news/magazine-29701767 https://www.bbc.co.uk/news/magazine-29701767 Newton was known to be very egotistical and his grudge with Hooke was well known: https://culturacolectiva.com/en/history/isaac-newton-dark-side-history/ https://culturacolectiva.com/en/history/isaac-newton-dark-si... Einstein was generally considered a very kind and generous man, outside of his marriages: https://www.grunge.com/264270/the-dark-side-of-albert-einstein/ https://www.grunge.com/264270/the-dark-side-of-albert-einste... I don't know much about da Vinci, though he designed machines for war and he must have performed a lot of macabre work on cadavers for his research into anatomy (not that studying anatomy is a bad thing).