The terribly sad passing of Sam Shepard means that Chuck Yeager (still alice and kicking at 94) outlived the man who earned a supporting nod playing him in THE RIGHT STUFF.
Only 3 performers won Oscars playing people who outlived them:
Gary Cooper (d. 1961) and Alvin York (d. 1964)
Haing S. Ngor (d. 1996) and Dith Pran (d. 2008)
Jason Robards (d. 2000) and Ben Bradlee (d. 2014)
But how many other times has this happened with Oscar nominees who didn’t win the award?
Found two women examples from the same year: 1955
*Susan Hayward (d.1975) was outlived by her I’LL CRY TOMORROW inspiration Lilian Roth (d.1980).
*Jennifer Jones (d.2009) was outlived by Elizabeth Comber, who used the pen name Han Suyin in her autobiographical LOVE IS A MANY SPLENDOURED THING.
That appears to be it across all acting categories–6 total.