Then define 'intelligent show'. I Love Lucy?
How about The Newhart Show, Dick van Dyke, even Seinfeld (even if the intelligence goes nowhere and proves nothing).
The Simpsons sometimes hits a chord but mostly is a slight angle on the usual subjects.
I find them almost too outrageous to watch but I've got to admit that 'Family Guy' and AMerican Dad' actually take the ideas further than the Simpsons ever have.