So you are saying that the majority of humans are forgettable?
I would say that there are numerous 10int and 10cha people that we know, interact with, and remember every day.
A 10 int is the guy that builds superconductors. He may not be able to tell you exactly what they do but he would none the less be an interesting conversation for a while.
A 10 int is most authors, good for 1-2 books before they run out of ideas.
A 10 cha is most Aging Rock Stars. They are DOG ugly and still have the girls because they have a high wis/int agent.
A 10 str is your average 20-30 year old that jogs once a week or so and tries to stay in shape.
These are average.
Cliff is an 8 Wisdom and a 10-12 Intelligence, this means that he acts like he is smarter than he is as he knows no better. (He had the right facts, just the wrong numbers...

)
Rocky is a 10 charisma. Forgettable except he is the muscle bound clod who can get your butt out of the fire.
Luke Skywalker was a 10 Intelligence.
Peter Parker is a 10 Charisma.