Re: Charles Freakin Darwin
Sorry. I was wrong. I'm from across the pond and haven't used pound notes since my visit during the '70s.
Removing Darwin, I'd say Bacon for the scientific method or Hutton for deep time.
As far as the others mentioned, yes they were great scientists and worthy of recognition, but, in my mind, they didn't, for the most part, change the way non-scientists think about the world in general.