That statement is just as incorrect as any other made so far.This^. Not only that, but madara and minato weren't even alive in the same time frame. And hiruzen was also a child-preteen(not even close to his legendary prime) when madara faught/lost against hashi. Harashima was the only ninja during madaras life who stopped him back then, that's why he always says that hashi is the only ninja that could stop him. Prime hiruzen/ Minato > EMS Madara. People are so simple minded its crazy.
We have no clue what Hiruzen could do in his prime. In his old age he showed 2 b-rank techniques and Enma, none of the 3 which would even touch Madara. Minato has only shown the rasengan as an offensive technique. Him using FTG isn't going to do anything to Sussano.
The only chance from what those 2 have shown is if they use Shiki Fuujin, and that's if they can get to Madara inside of Sussano.
While it's possible both Hiruzen in his prime and Minato would be capable if we knew everything about them, we don't know that, and therefor that statement is false.