Chung Dam Dong -- have been here a few times. My favorite is their pork belly and octopus chul-pan where they stir-fry some pork belly and octopus and in a spicy gochujang-based sauce. Huge portions. After you have finished most of it, they'll bring out some fried rice and mix it in where it gets all nice and hot and savory. Very generous with their banchan.
Tang Maru -- If you don't read Korean you may have problems finding this place as there's no Tang Maru written in English, only in hangul (Korean characters). I believe the only English word outside is tofu. They have a really good gamja tang and hae mul pa jun. Love their pajun because it's mostly scallions and seafood with small amount of flour. It looks like they specialize in tofu dishes though I did not see one person order a tofu dish. They were all getting soups. Banchan includes one whole fried fish per person.