brisket with stout or bock would be tasty, shiner bock comes to mind since its from texas and should be easy to find. The more hop bitterness a beer has, the livelier the meal needs to be. id avoid your coffee porter, but the oatmeal or dry irish might be nice.
How are you doing the pulled pork sauce or no sauce?
A higher % beer will bring the spiciness out in the slaw but sweetness will soften spiciness.
I hate mustard anything so i have no idea what to drink with it. imo anything will make it taste better. sorry im not more help.
Nor have i had drunken beans but they look awesome.
You could even try some sours or lambics, i really like liefmans goudenband , the acidity and sourness are just right imo for beef. A sweeter sour could go well with the pork but ive never tried it. only problem is how adventurous people are and this stuff could hurt the wallet i can't imagine a case being cheap but liefmans comes in the 750ml bottles so its like 2~3 beers a bottle.