Ahem, 1984 OG weren't exactly "early" And it's no surprise it happened in gymnastics.
Men's vault - 1 gold, 4 silvers (including Li Ning who lit the 2008 Olympic cauldron).
https://en.wikipedia.org/wiki/Gymnastics_at_the_1984_Summer_Olympics_–_Men's_vault
Gymnastics also provided a couple of examples where a gold medal was shared by more than two people. In one case all three were from the same country to add to the lunacy!
https://en.wikipedia.org/wiki/Gymnastics_at_the_1948_Summer_Olympics_–_Men's_pommel_horse
https://en.wikipedia.org/wiki/Gymnastics_at_the_1988_Summer_Olympics_–_Men's_pommel_horse