Nice deck! I would consider adding:

The signets (Boros Signet, Orzhov Signet, and Rakdos Signet). Your commander is 6 mana, so some more ramp will help you reliably play him, especially if he ever gets killed.

Because you are playing Urborg, Tomb of Yawgmoth, have you considered playing Cabal Coffers?

I don't want to play more ramp. Just feels bad not to play a creature for a turn. Casting my Commander isn't a big priority in this deck.

Not a big fan of cabal coffers either in this deck either. It's not good enough on its own in this deck and I dont really have anything to help me to assemble the combo. mana ramp isnt that ig of a thing for the deck anyways

Personally, I like having Falkenrath Noble in my Edgar Markov deck to have another Blood Artist ability. Other cards I would also recommend would be more one drop vampires such as Voldaren Epicure, Vicious Conquistador and Vampire of the Dire Moon.

Thank you for your suggestions. I've thought about addng more one drops to the deck which is why some of them are already in the maybeboard but I dont thnk that they are impactful enough in a commander game. I'd rather play 2 and 3 drops. I find falkenrath noble to inefficient tbh. Wouldnt play him except for dedicated aristocrat decks.

Test

I've always found with Edgar I need more GAS. Could use a little more draw perhaps?