This is the Warlock list I built & hit legend with in the January 2021 Season. Overall, it's straight forward to play, life-tap, remove minions, play big things. I built it as a direct counter to Ramp Paladin & it ended up just performing really well against everything else too. Still playing it this season, closing in on legend again. It still performs really well against almost everything, with aggro weapon rogue being the one that I just usually lose to (unless I'm developing tempo while removing theirs). 

Legend Proof: