This seems like a really pointless and unanswerable question. Obviously, the more ancient the personality, the more impact he or she had on history. Society is, at a macroscopic scale, a chaotic system. Change some minor event 30,000 years ago and we might be riding flying cars or horses right now, speaking in the various offspring of long-extinct languages and looking at a radically different world map. Closer to now, remove Julius Caesar from the equation and for all we know the Roman Empire would have fallen, Europe would be Celtic and Christianity would never have taken off. Remove Gutenberg and the progress of literacy and science in Europe would have been stalled for as much time as it would have taken for someone else to do the same thing - perhaps decades, in which case it would have been critical - perhaps no time at all, because most inventions are incremental improvements over contributions that were made by numerous people before then, and are more or less "waiting" to be discovered (thus why many discoveries are made by several people at the same time).
At large, we could assess the "influence" of someone by how much of current society they "directed", as in, what their legacy is, notwithstanding the kind of "butterfly effect" everybody has. In that sense, Jesus Christ, a character of dubious authenticity and whose story has certainly been heavily romanced, is a poor choice, because so to speak he'd be remembered the same regardless of what he did. Christianity, as any religion, seems to be a team effort, so I doubt we can trace back anyone in particular as a major influence - somebody had to write it, many people had to spread it. The American revolution, which I believe has a great legacy, also seems to be overdue and a team effort, so it's difficult to meaningfully assign influence. Most technological advancements are extremely incremental (even when they do not appear so), so influence has to be accordingly split. It is difficult to tell at this point how influential Hitler was - Israel, scaring Europeans into uniting themselves, and what else? I'm not sure what Stalin did that was influential besides slaughtering people.
"Whoever" invented the wheel was probably thousands of people in all cultures through all of early history - due to a lack of communication between tribes, most early inventions were probably made everywhere independently. The "first" Homo Sapiens does not exist - that's meaningless and it's just not how it works. We don't go from one Homo to the other from a unique mutation, it is a gradual process for which the ingredients are brewed during a long time.
In the end, I got nothing :)
