There are a lot of characters in Game of Thrones, but if you have to pick just one, then you should probably vote for Tyrion. He is a blatantly stupid character who makes a lot of bad decisions. His internal monologue brilliantly displays his poor decision-making. He is also very ignorant of the world around him. His only redeeming quality is his courage, as he tries to prevent Missandei from being beheaded.
Lord Varys’s father Viserys was a crass and cruel man, who lost his family in the Robert’s Rebellion. He continued to be abusive to his sister after her marriage. He also bungled the Battle of the Bastards and was only saved when his sister Sansa intervened. His death allowed Daenerys to grow as a person.
Littlefinger. Littlefinger was once an interesting character, but Game of Thrones hasn’t really known what to do with him since King’s Landing. His crimes include murdering Lysa Arryn, taking control of the Eyrie, and being the leader of the Boltons. Thankfully, we have a way to see him in action again in season seven. The stupidest character on the show is Jon Snow, but he isn’t the only one!
Tyrion Lannister is another great choice for dumbest character in Game of Thrones. His character lacks Cersei’s reckless streak, but he is capable of teaching himself most things. He can adapt to any situation, and he is incredibly smart. Davos understands the value of allies and has a high IQ. He also doesn’t have any moral compass.