All the guys you listed have one glaring thing in common. They're all American. That's the big factor that goes unsaid. Therefore, in looking at the next "Boxing Legend", one would probably have to start there. Right now that cuts the list way down to....... well..... zero. Why? Because you also need an outlandish personality to match. Floyd, Ali, Tyson... they all had it... and Sugar Ray and RJJ weren't too far off. Not so much Hagler, but then Hagler existed in a golden age for boxing. His list of opponents (like Sugar Ray) reads like a Who's Who of Boxing.
Deontay could've been that guy... but his boxing skills are too crude, and his list of opponents makes one yawn. He's too far along to change that now, so scratch him from the list. Crawford? Too bland of a personality and besides... only hardcore boxing fans know much of him.
So my short answer is no one, at the moment.
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