That would be the MVP (Most Valuable Player) award.
Fnals MVP
The most prestigious is the Fields Medal. See link.
The Pulitzer Prize is the most important award worldwide. The Man Booker Prize is considered the most prestigious award given to UK authors. The National Book Critics Award is considered the most prestigious award given to US authors.
Arguably the most prestigious award someone can win is the Pulitzer Prize.
The Heisman Trophy.
param vir chakra
Robert Gallery
The Nobel Peace prize is used for many scientific discoveries in the medicinal department, it is a very honorable award to have.
Best in Show at Crufts is regarded as the most prestigious award that a show dog could win in it's career.
Dunlop
Uefa champions league.
Considering that their are only 4 given out for the entire season (Rookie Challenge MVP, All-Star Game MVP, NBA MVP [for the season], and the NBA Finals MVP), the most prestigious would easily be the NBA MVP award.