Breaking bad being a 10 for me, i would put shameless at a 8.5. Very entertaining, emotional, funny, fun, and surprisingly educational in a weird way. One thing that i didn't like about it was that there were too many sex scenes.
I would highly recommend that you watch Justified if you have not already. Fantastic show. i would give it a 9.3 or so. Great humor, action, drama, intrigue, fantastic acting by the all the main characters (especially the main villain). The only reason i dont give it a 10 is because it is a show that doesn't really stay with you after you have watched it. Doesn't have any weight to it like breaking bad. Just a very very good show that is extremely fun to watch and then move on.