Question: who are the strongest nen users?
Answer: 1 Meruem. Also known as King, Meruem was the strongest Chimera Ant and the most powerful being in the entire Hunter x Hunter series until now.
2 Isaac Netero. ... 
3 Maha Zoldyck. ... 
4 The Royal Guard. ... 
5 Zeno Zoldyck. ... 
6 Ging Freecss. ... 
7 Gon Freecss. ... 
8 Chrollo Lucilfer. ...