Everest, Kangchenjunga, Makalu, and Cho Oyo, Lhotse. The standard route from the north involves little more than high altitude glacier walking. The ease of reaching this elevation may be its biggest danger but there are good weather and snow conditions are necessary for safety and success. The region was first explored extensively by British expeditions in the early 50's before and after the ascent of Everest. Members of those teams included Edmund Hillary, Jimmy Roberts & Eric Shipton was probably the person who can take most of the credit for establising the trekking industry in Nepal in the early 1960's. He was posthumously awarded the Everest National Award" by the government.
