Not sure if this has been mentioned yet, but ... Battlestar Galactica.
I'm serious. People write it off, thinking it's purely sci-fi and nerdy like Star Trek, but it's not. The Sci-Fi is almost an after thought. Very powerful show, and it's a shame more people haven't watched it yet. It really is epic. A few slow episodes, but watch at least the first season. If you're not hooked, than it really isn't for you.
Another show I loved, was Deadwood. Lots of cursing but the cursing isn't gratuitous. The creator (David Milch) former University English lecturer, weaved Shakespearean language patterns with lewd and obscene language.
It's a shame it was cancelled after just 3 seasons. It was truly a great show. Quite possibly one of the best shows ever IMO.