List some players who have played only in one grand slam finals technically a finalist and did sod all in the rest of their careers.
On top of my head in alphabetical order
Alberto Berasategui
Andy Medvedev
Fernando Gonzalez
Henry Leconte
John Lloyd
Magnus Norman
Marcos Baghdatis
Michael Pernfors
Rainer Schuttler
Tsonga
Zina Garrison.
Feel free to add more names....
On top of my head in alphabetical order
Alberto Berasategui
Andy Medvedev
Fernando Gonzalez
Henry Leconte
John Lloyd
Magnus Norman
Marcos Baghdatis
Michael Pernfors
Rainer Schuttler
Tsonga
Zina Garrison.
Feel free to add more names....