There is no single answer to the question of who is the "best" human in the world. The concept of "best" is subjective and depends on the criteria used for judgment. Different people will value different qualities and achievements. However, various sources highlight individuals considered among the most influential or impactful in history.
Different Perspectives on "Best"
Several sources mention Prophet Muhammad as a highly influential figure in history, citing his role in establishing Islam and his widespread impact on billions of people. https://gitapeaceformula.quora.com/Who-is-the-greatest-living-person-on-Earth-today https://www.quora.com/Who-is-the-greatest-person-in-the-world-1 https://www.quora.com/Is-Muhammad-the-greatest-man-in-the-world Other historical figures, such as Lord Rama (mentioned in a Quora discussion), have also been cited as significant figures whose lives and actions have deeply impacted others. https://www.quora.com/Who-is-the-best-man-that-ever-lived-on-earth-and-who-is-currently-the-best-man
It's important to note that the concept of "greatest" or "best" is often tied to personal beliefs and values. A ranking of the most influential persons in history (https://en.wikipedia.org/wiki/The_100:_A_Ranking_of_the_Most_Influential_Persons_in_History) would likely differ depending on the criteria used and the perspectives of those compiling the list.
The question of the "best" human also depends on the time frame considered. Currently, the focus may shift to individuals making substantial contributions to current global challenges, such as those working in artificial intelligence to solve significant problems, as mentioned by Bill Gates. https://www.gatesnotes.com/The-Age-of-AI-Has-Begun
Ultimately, defining the "best" human is a matter of personal perspective and values.