The Top 3 fighters (versions of) that only had 1 fight.

[Nash out]

1. Tokyo Douglas - Defeated Mike "very much in his prime" Tyson via way of schooling and TKO
2. Germany Fury - Dazzled in an enthralling chess battle against prime, unified, unbeaten for 11-years P4P number 1, Wladimir Klitschko
3. Astro Burger Zelenoff - Beat Crazy Tempo (points) on the back foot with a tremendous display of Mayweather-like running

Any other contenders to this list? Nash out - His Majesty

[Anomalocaris]

Fury had more than one, Wilder 2 was perfection.

[Nash out]

Fury had more than one, Wilder 2 was perfection.

That was Fury 2.0 at his peak, that's for sure. Nash out - His Majesty

[Anomalocaris]

That was Fury 2.0 at his peak, that's for sure. Nash out - His Majesty

Yeah if only he could have had a full career.

Fate.