Here's a deck for you that runs Vraska, Golgari Queen and Liliana, Untouched By Death side-by-side at maximum effectiveness.
Reassembling Skeleton is looking better than ever here, often chump blocking with deathtouch because of the playset of Death Baron.
Demon of Catastrophes fits in great here as well, but I've chosen to keep him at 2-3 copies due to curve restriction. It's all good though, because Doom Whisperer is chilling in the sideboard as well, with a synergistic effect added to the same body our favorite demon provides. Underrealm Lich takes the top of the curve-spot in the mainboard though, due to his ability to fix hands, gain indestructibility, and for having a zombie creature-type.
Midnight Reaper is a nightmare for control match-ups, and fits perfectly into this deck. Between the reaper, vraska, and the lich, this deck should often have card advantage. Even if your hand is emptied, Graveyard Marshal and Reassembling Skeleton still on their bs tho.
assassin's trohpy no joke, but it ain't perfect. 3 copies (plus Mausoleum Secrets) does the trick. The Planeswalkers each, and the army of deathtouchin' MFers should knock out plenty of your opponent's creatures.
SIDEBOARD:
Necrotic Wound is a sweet card, and a considerable option for a mainboard upgrade. The exile effect is important in a lot of match-ups, so it's a must in the sideboard, at the very least.
Prey Upon Is the most reliable answer to Vine Mare and Knight of Glory; two cards that pose a problem for this deck. At least 2 copies of this is a must.
Ghalta, Primal Hunger is relatively easy to card if you board it in a creature heavy formation against the right deck.
Carnage Tyrant is a nightmare for control match-ups, so I gotta represen and throw 1 in the sideboard.
Doom Whisperer is like, my favorite card in his set, but he's vulnerable to a broad range of removal, so he's better off in the sideboard it seems.
Charnel Troll is a good body, especially when up against burn-removal. Some match-ups are just going to Shock your Death Baron before he gets value, so lightening up the zombie-tribal for an even more creature heavy approach is available here.
I believe this deck is going to be an upper-tier deck, based on how it's performing on cockatrice. That being said, I built this from scratch, and I'm no pro, so any comments you have to share are appreciated.