This is pretty hard to predect thread considering we know nothing about the White Fang but hey the title sound catchy .

Anyway I think that the White Fang would win cause he was awsome and was considered to be on par with the Legendary Three Sannin. and he had that sweet which chakra blade.....

It is Yellow Flash for me. Yes White fang is a par to Sannins but Yellow Flash became a Hokage and i think it has a good reason why he became a hokage.

Well, i think the Yellow Flash would win. He was beyond Sannin level imo. I didn't even know that that was said about the White Fang, equal to the Sannin, huh? Interesting.

- Magic

Yellow Flash has been state more than once as the strongest nin there has ever been. Jiraiya said that Naruto almost killed him when he released his fourth tail, but Yellow Flash could defeat the 9 tail at full power, so this means he was far beyond Sannin level...
White Fang may have been a powerful nin but the fact that he´s been mentioned just once through the series means that he really wasn´t that outstanding, don´t you think? I mean, there may have been more nins at his same power...however Yellow Flash is always said to be the strongest ever.

Yellow Flash because hes suppose to be way above sennin level.