Edmund Hillary
Sir Edmund Percival Hillary (20 July 1919 – 11 January 2008) was a New Zealand mountaineer, explorer, and philanthropist. On 29 May 1953, Hillary and Nepalese Sherpa mountaineer Tenzing Norgay became the first climbers confirmed to have reached the summit of Mount Everest. They were part of the ninth British expedition to Everest, led by John Hunt.
Toshio Yamamoto (mountaineer)
Toshio broke the record during a period of intense competition for oldest summiter, taking the record from Lev Sariskov who had summited Everest in 1999 at the age of 61. By the time Toshio made his summit in 2000, over 800 had summited and 180 had died since 1953, according to the Washington Post. The record was broken almost every year during this period, Toshio surpassing Lev Sariskov from the previous year and Sherman Bull in turn breaking Toshio's record the next year and this record was broken several more times in the following decade. By 2013 the record was set at 80, by Yuichiro Miura who had also set a record of 70 in 2003 and was the first person known to ski down Everest in 1970, as documented in the film "The Man Who Skied Down Everest".