No removal other than Vraska? Maybe some putrefy or Gaze of Granite. Loose a couple of Jarad. Think about Lotleth troll and Varolz maybe. Use Lol troll to get creatures in the yard for Varolz to scavenge and you get counters both ways.My take on Golgari Agro is here: http://www.mtgvault.com/paul7926/decks/golgari-aggro/Might be of some use to you
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Had a soft spot for Bosh ever since an old golem tribal deck I had way back! Never thought of him for EDH. May just steal this list of yours. :)
I like it but I'm not really understanding the Crypt Ghast. I assume that dropping these for Liliana of the Veil is not an option due to cost. She would fit well in here tho.