I almost bought it....

[mqstout]

* If you don't have Dominion (card game), get it.
* Betrayal (while a good game) might not meet your needs. It doesn't scale well with players, and it's more "light" than your types of players suggested might like.
* Mansions of Madness is a decent game, try it out before you buy it though. It has more limited replay (few scenarios) than the others, but they have a decent (cheap) expansion rate and some scenarios are replayable from choices (but not as replayable as LNOE scenarios).
* ATOE takes a bit longer than LNOE and is a bit more about resource management than LNOE. I find it works best as a competitive game (though there are cooperative rules).
* I don't yet have enough experience with FANG to comment.
* I really enjoy COPE -- it's usually pretty quick so you can get it and something else in.
* If you want more LNOE, get its expansions or IFOS. There's a lot of depth in the game if you only have the base set!