Dutch Uncle
* Tertia Optio * Defend the Constitution
Newton despised Leibniz and probably worked behind the scenes to tarnish his reputation!
I think Mendeleev gets short-shrifted on reputation; the periodic table might be the most iconic symbol of the high school science classroom.
Selective breeding of livestock and plants was certainly considered by Darwin, but evolution by natural selection was a novel concept, and it took the early 20th century synthesis with genetics for people to understand how natural selection would lead to evolution.
While it's good to have heroes and figures to emulate, putting them too high on the pedestal is often an error. Newton and Leibniz are one example.
In my life I've personally seen people who were applauded more than they deserved and people who were never properly recognized for their contributions. Most don't care.
One reason many recipients of medals of valor or other accolades are humble is that they know that there are a lot of others who deserved to be recognized and weren't.
Another example is Captain Chesley Sullenberger. Great guy and very humble. The media made him out to be a hero, and he was, but he also fucked up and got a lot more recognition than his crew; FO Jeffrey Skiles and FA's Doreen Welsh, Donna Dent, and Sheila Dail. Such is life.