Gloomhaven. And the fantastically deep, rich tactical battles, enormously distinct and compelling class design, constant stream of meaningful decisions at both a micro and macro level, and of course the sheer ridiculous amount of content in one merely $140 MSRP box are what make it stand out.
It’d probably also be my answer for AI design because of the personality the action cards for each monster type give and the robust handling thereof, but something app based like Descent/Imperial Assault/Mansions of Madness 2E would be next up.
MoM also stands out as a pretty solid horror-themed “dungeon crawl” of sorts, and past that I’d probably plump for Eldritch Horror, Arkham Horror (both card and board game), and the Pathfinder Adventure Card Game or better yet Apocrypha, none of which are strictly speaking classic dungeon crawls, but they capture the adventuring feel that I’m looking for, fighting monsters, having story encounters, advancing characters and getting all sorts of fabulous loot and other upgrades. (Well, the story is more frame than individual encounter in the latter two and vice versa for the Horrors.)
I’m guessing things like Imperial Assault, maybe Descent 2E (both with apps), Hexplore It, and Sword & Sorcery would be on my list if I’d played them yet. (I mean, I’ve played the first two as a one vs. many affair but I do not recommend that.)