The correct answer is Thurgood Marshall.
Thurgood Marshall was appointed to the Supreme Court in October of 1967. Thurgood Marshall earned a stellar reputation as a lawyer thanks to his work in the Supreme Court case of Brown vs. Board of Education (1954). His argument describing how segregated public schools violated the Equal Protection Clause of the 14th amendment resulted in him gaining national fame and prominence. He would go on to serve in the Supreme Court for over 20 years.