Kyle Busch, one of the greatest

He has won a race on every active NASCAR Cup Series track. 

He was the all-time wins leader in both the O’Reilly Auto Parts Series (102) and the Craftsman Truck Series (69)

He is ranked ninth all-time for Cup Series victories (63), with two championships (2015 and 2019).

https://www.racingjunk.com/news/kyle-busch-nascars-winningest-driver-dead-at-41/

Twelve days prior to his death, Busch had complained of sinus issues while racing at Watkins Glen and asked for a doctor to visit him in his hauler after the race. However, he continued to race afterward, even winning a Truck Series race in Dover, Delaware, one week ago. 

He died of pneumonia leading to sepsis, resulting in rapid and overwhelming associated complications

https://sports.yahoo.com/nascar/article/kyle-buschs-cause-of-death-revealed-severe-pneumonia-sepsis-152333480.html