Wow. This thread makes me wanna cry. It's like a list of my all-time favorite games and developers, but it's a naughty list?
My fave developers of the past 10 years: Bioware (Mass Effect has bugs but it's ambition is breathtaking, KOTOR is brilliant, Jade Empire very strong), Bungie (People who say Halo is overrated forget what console FPS was before Halo and what online FPS was before Halo 2: they created the blueprint) , Bethesda (Morrowind and Oblivion are both deep and brilliant with flaws, of course, but amazing - remember when Oblivion came out in the life cycle of the console)
and I really liked Fable, Mario and most of the Final Fantasy stuff. I would agree that Fable gets a bit of heat for under-delivering on some of its promises, but that was a great game unlike other stuff at the time.
The only one I would agree on in this list that's over-rated is Rockstar, in that GTA is over-rated. Any game that lauded should have a targeting system that works, for example. Now GTA IV might change my mind - we'll see.