yup, imho a really good stout base is the eternal 80% pale 10% high-lovibond (+450) roasted barley and 10% flaked barley.
if you wanted to modify it from there, maybe add a few ounces chocolate or crystal.
i've been thinking about a stout of 75% pale, 5% roasted barley, 10% brown malt, 10% flaked barley. any thoughts? i really want to try it.