(If you do feel nibbles from Rakdos vampires in Commander, that deck can be full of flavor.) That said, there are still a lot of great ones in black to fill up the creature base
The one thing holding Liberator back is that it doesn't fit a mana curve particularly well unless you somehow gain access to additional mana on turn four
Krenko, Tin Street Kingpin Suggested Cut: Keeper of the Accord Krenko, Tin Street Kingpin is still really good for us, though
While this card has certainly seen more play in Legacy, the ability to jam the Monarch into play and scale with a leverage that Forth provides is also quite good in a format like Vintage where there aren't always going to be creatures to steal back the Monarch
Vigilance keeps it available for blocking, too, making the Prophet a steady value engine that rewards you for committing hard to the zombie plan