One of the most outstanding high-altitude mountaineers is Krzysztof Wielicki from Poland. He climb all fourteen eight-thousanders (fifth man on the world). With Leszek Cichy he did first winter ascent to Mount Everest. Krzysztof climb also in winter Lhotse and Kangchenjunga. He is member of The Explorers Club.
Lot of climbers have websites where you can read something about this person, but sometimes website is very good blog, where you can read about climbing trips, etc. Here you have list of climbers, who have nice blog.
Jerzy Kukuczka (1948-1989) is counted among the most outstanding mountain climbers in the world. After Reinhold Messner, he was the second man in history to have captured the Crown of the Himalayas. He do it in better style, than Messner: under 8 years, 11 new routes, four winter ascents. Only on one ascent, he use oxygen. He was one of an elite group of Polish Himalayan mountaineers who specialized in winter ascents (called Ice Warriors).
He is the first man who made the first winter ascents to the 3 eight-thousanders: Dhaulagiri with Andrzej Czok in 1985, Kangchenjunga with Krzysztof Wielicki in 1986 and Annapurna I with Artur Hajzer in 1987. One of the hardest routes in Karakorum is Polish Line, new route on South Face of Kw (with Tadeusz Piotrowski), which no one has ever repeated.