Karpov
umm... but Karpov has won a world championship and has been world champion - both against Korchnoi (late 70's and 1981) and in 1993 against Jan Timman.
Karpov didnt win the title, he retained the the title that was given to him.
Is there some doubt in you that Karpov was actually WC calibre ? Given his results from 1975-1985 I dont know how anyone could still have any doubts about his qualification as a world champion. He "won" the title by default when Fischer refused to play, but in your mind the title was "given to him". He won the candidates matches to get to the position he was in , had Korchnoi won the final it would have been Korchnoi that became world champion by "default". Probably Karpov would have been his challenger in 78 too.
Interesting comment about Karpov... I have always enjoy this games and his style of play a "true chess champion". But history should tell the entire story and if the truth be told then why did Bobby Fisher lose his title to Karpov and then the groverning body FIDE grant the same identical requests that Bobby made to Karpov?? Perhaps someone can give me a better understanding one this please???
One thing is for sure if Fischer hadnt quit and played Karpov they would have both gotten bloody ! Its just a pity that the world was deprived of the many beautiful games they would have produced together..... by the time Kasparov joined them in the picture Fischer would have been past his best I think and declining . Even so, they also would have produced some brilliant games for all to enjoy.