(EDIT: As it turns out, prices have fluctuated since I last checked. The drop is about the same price as getting two of the boardgames on Amazon right now.)
For those looking to get these as a source for minis in their D&D sessions, I recommend picking up Wrath of Ashardalon + Castle Ravenloft (which happens to be the banner image for the board games MD community as well!). Each includes 39 miniatures for a total of 78.
Wrath of Ashardalon has many classic monsters and a general fantasy theme, whereas Castle Ravenloft favors the undead-- which is where the former is lacking.
The rest of the board games, in my opinion, provide more concise, thematically focused minis, which makes them less suitable for buying for bulk minis; and they have less minis than the two I suggested.
Temple of Elemental Evil would be a good choice as well, but has a rather general fantasy theme with the minis like Wrath of Ashardalon. If you don't think you'll use undead, but need some hobgoblins, gnolls, and a bunch of generic armored humans, (WoA lacks all of those), I'd strongly recommend you go with Wrath of Ashardalon + Temple of Elemental Evil.