(As using Ton was not a good idea. I am using ATG system to measure their strength. I am only measuring their strength as they don't have a lifespan similar to that cultivation realm. Moreover, this is based on my imagination, so there are only three stages early, mid, late and peak stages)

1- All Might - Mid-Emperor Profound Stage

2- Killua (during hunter exam) - Late-Sky Profound Stage

3- Netero - Mid-Tyrant Profound Stage

4- Meruem (Comparable to Mid-level monsters in Dark continent)- Late-Tyrant Profound Stage

5- Creatures from Dark continent-

- Low-Level creature - Peak-Emperor Profound Stage

- Mid-Level creature - Mid-Tyrant Profound Stage

- High-Level creature - Mid-Sovereign Profound Stage

- Disaster Level creatures - Early-Divine Origin Stage

- Overlord (strongest creature in Hunter X Hunter) - Peak-Divine Origin Stage

6- Demon King (Seven Deadly Sins) - Early Divine Origin Stage

7- Admiral Level - Mid-Sovereign Profound Stage

8- Yonko Level - Early-Divine Origin to Late-Divine Origin Stage

9- Whitebeard/Roger/Garp/Gorosei(in prime) - Early-Divine Soul Stage

10- Im( Strongest in One Piece World) - Peak-Divine Soul Stage

11- Might Guy (Night Guy form) - Mid-Divine Tribulation Stage

12- Madara (10 Tails Jinjuriki) - Peak-Divine Tribulation Stage

13- Kaguya - Early-Divine Spirit Stage

14- Ophis/Great Red - Peak-Divine Spirit Stage

These strengths are just my estimates. If you have anything you can comment me on this so I could make a change to these details.