LAD
GSAD - formally known as LAD
But, they don't keep separate records for playoff wins/losses vs. Finals wins/losses.In the Finals.
But, you have to win 3 playoff series to get there. That, is a winning record.
In fact, LeBron's series playoff record since he went to Miami is 24-4. That is insanely good and could in no way be viewed as being a "loser".