Ghoulcaller Gisa (Mono-Black Zombies) Tribal decks are a lot of fun and a great way to get the hang of deckbuilding
Most of the from Urza's Saga
He may be nearly twice the price of Atraxa, but green/black decks can easily ramp or reanimate him out early on
You miss out on the red and black shrines, but that precon has several historic payoffs that you can leverage, and you can add Layla Hassan and Elena, Turk Recruit if you feel like mixing your franchises
The most heartbreaking thing in Dredge was to see in the opening seven something like two Reunions, Imp, Thug, and only one land, which would be unkeepable
Having such a low print run of the first wave is definitely Pokemon's fault