Byron “Whizzer” White came pretty close.
While he ended up being considered "conservative", his opinions were actually mainstream democrat viewpoints at the time.
The democrats went so far to the left, that he was a relic from when there were sensible democrats.
His dissent from Roe v. Wade should be mandatory reading.
He didn't change, the country's political landscape changed.
Too bad that the SC justices appointed by "republicans" often went cuckoo liberal.
Earl Warren, Souter, Stevens, Blackmun, Roberts, etc.