Name a fighter heavier than another fighter in the weightclass above (fight night weight)

[TankAbbott4Eva]

No.
You'd be doing it right if you'd mention a let's say lightweight, who weighed more on fight night than some welterweight did at fight night.

 

[You Will Vote For Dreyga]

I believe there is limit of much weight you can out on between weigh-in day and the fight. I believe it's 10% of the actual weight limit. So for example in the 205 division the weight limit is 225..5 on fight night. As such fighters weighing more in ring that fighters of the weight class above them should be rare.