Obviously the abuser-of-office and segregation revivalist Bork. For all his blather about supremacy of Congress in making laws, he was sure eager to (ab)use the Court to override those laws in the name of "states-rights."
I'd go even farther: Bork and Scalia introduced deep evil into our constitution with that thing they called originalism -- something that, incidentally, never previously existed in any interpretation of English common law.
Clarance Thomas was clearly to the right of Scalia and probably to Bork as well.
I agree Thomas was to the right of Scalia and Bork. That said, Reagan still shouldn't have nominated Bork, for the sake that he was tainted by Watergate alone. Kavanaugh, Bork, Miers, Thomas, and Fortas were easily the five worst nominations to the Supreme Court of the last 50 years.
How was Fortas worse than Carswell or Haynsworth?