Smart characters

Intelligence is "inter-ligare" in Latin, "between-link", it is the creative process of linking. Genius comes from the Latin "genius", "produce", like in "generate", it is a man who create many links, far beyond others, from simple to complex. They also make more pattern recognition, see the general laws of things.

Fictional

Emmett "Doc" Brown, Back to the future.
Will Hunting, Good Will Hunting
Edward Morra, Limitless.
Brian Finch, Limitless.
Gregory House, House M.D. .
Sherlock Homes, Sherlock Homes.
Dr. Henry Morgan, Forever.
Frank Walker, Tomorrowland.

Real

Ramanujan
Pascal
Descartes
Gödel
Gauss
Einstein
Galois
William Sidis
Ray Kurzweil
MIchio Kaku
Leonardo da Vinci