One of the most brutal fighters in UFC history is Khabib Nurmagomedov. Khabib is undefeated in the octagon and is considered to be one of the most proficient grapplers ever to have competed in the UFC. His strength and skill have made him a fan favorite and he is known for being especially ruthless when it comes to grappling with an opponent. Other fighters known for their brutality in the UFC include Conor McGregor, Chuck Liddell, and Anderson Silva. These legendary fighters have each won numerous fights, but are also known for their aggressive styles and willingness to inflict punishment on their opponents.