#3 Jim Hines
To this day, the "10-second barrier" is considered the benchmark for elite male 100m sprinters to beat. You're only world class if you've gone below that magical number.
The first time in recorded history that humanity went faster was during the men's 100m final at the 1968 Mexico City Olympics, and Jim Hines did it.
With a time of 9.95 seconds, Hines set a WR which was considered beyond the capacity of a human being, period.
While he definitely had some help from the new rubber track and the high altitude of Mexico City, his performance inspired the following generations to truly test the boundaries of the human body and spirit, and never again believe in arbitrary limits.
Edited by Musab Abid