undisputed

adj

1. Universally agreed upon; not disputed.

   “She may be declining in popularity, relevance and quality, but Ayumi Hamasaki is still the undisputed Queen of J-Pop, and it will be a long while before anyone can surpass her.”

   “The publishing industry is littered with frequent blurbers. Still, Mr. Shteyngart managed to stand out as an undisputed master of the form.”

2. Unchallenged and accepted without question.