I enjoy all of the shows you mentioned (except for Sunny in Philadelphia which tries too hard and has poor acting; just could not get into that one at all) and I'm liking Justified and Community right now.
I just borrowed Misfits off a buddy, which is like the British Heroes and is apparently very good, but I have yet to watch it.
KT
Are you actually enjoying Justified...I had high hopes for this one but for me it has fallen flat on its face...I watched the first 4 episodes and quit.
My nominees for the OP..not sure if you want current still producing or some great ones from the past as well:
Breaking Bad is currently the best show on television.
Dexter
Sopranos
Oz
The Wire
Deadwood
Lost ( but can only watch it as a 'binge'...can't do 1 episode a week)
Big Bang Theory
Modern Family
Two and half Men
Boston legal (someone else mentioned this one and it really was a great show)
Currently trying to watch '30 Rock' and I hope it improves...NO where near Modern Family funny.