I totally agree! In a perfect world there would be a MCF game a week. (Never happened, they are too complex to make, but how awesome would that be!)
I'm sure you've tried nearly every other game, but just in case, here's a few recommendations:
The Hidden Expedition Games (Especially Amazon)
Agatha Christie: Peril at End House & Death on the Nile
3 Cards to Midnight (Very long and very tricky)
I don't often play the large file games but really liked the Dracula 3 and Dracula Origin. Terrific puzzles in both. Plus far more game-time than the usual ****.