Hunter X Hunter is well-known for having great villains with multidimensional personalities. Characters like Hisoka and Meruem are easily some of the most iconic villains in anime – part of this is due to the depth of their intelligence and cleverness. However, there are also plenty of villains in Hunter X Hunter who can't claim intellect among their list of strengths.
Source:https://www.cbr.com/dumb-hxh-villains/