I'd like to have a complete list of all skaters who landed a clean quadruple jump in an ISU competition in the 20th century.
These are the ones I'm aware of:
Kurt Browning
Alexei Urmanov
Petr Barna (I'm not sure he landed a completely clean quad though)
Konstantin Kostin
Zhang Min
Guo Zhengxin
Elvis Stojko
Timothy Goebel
Ilia Kulik
Michael Weiss
Ilia Klimkin
Alexei Yagudin
Evgeni Plushenko
Who am I missing?
These are the ones I'm aware of:
Kurt Browning
Alexei Urmanov
Petr Barna (I'm not sure he landed a completely clean quad though)
Konstantin Kostin
Zhang Min
Guo Zhengxin
Elvis Stojko
Timothy Goebel
Ilia Kulik
Michael Weiss
Ilia Klimkin
Alexei Yagudin
Evgeni Plushenko
Who am I missing?