Of that list I have to say Coria, as he was inches away (TWICE) of actually winning one.
Some people have been close to reaching finals, or had chances to win a final, but he came closer than anyone.
His French Open final is a horrible final to re-watch (and this coming from someone who wishes Henman had beaten him in the semi final!).
"You used to be able to disagree with people and still be friends." - Clint Eastwood