Noun
good loser (plural good losers)
(informal) A person who responds graciously to losing.
Coordinate term: sore loser
You must never be satisfied with losing. You must get angry, terribly angry, about losing. But the mark of the good loser is that he takes his anger out on himself and not his victorious opponents or on his teammates. Richard Nixon
To be a good loser is to learn how to win. Carl Sandburg
Granny Weatherwax was not a good loser. From her point of view, losing was something that happened to other people. Terry Pratchett
All the world loves a good loser. Kin Hubbard
Show me a good loser and I'll show you an idiot. Leo Durocher
O God, help me to win, but in thy wisdom if thou willest me not to win, then O God, make me a good loser. Robert Baden-Powell