Games that I really like
Board/Minis: I love Descent & the idea of Arcadia Quest (won't play it until I get Inferno later this year). I hate painting minis, but I love - LOVE - the idea of pre-painted minis. Unfortunately there's not much in the way of those. Fortunately we have X-wing.
Board/Card: Wits & Wagers, Ashes, Baseball Highlights 2045, King of New York, Tiny Epic Galaxies, Vault Wars, Pixel Tactics (soooo underrated!), Tides of Time, Lanterns, Codenames, 7 Wonders, Snow Tails, Mysterium, Quantum, Game of Thrones 2e, War of Indines, Carcassonne, Pastiche
Games similar to Gravstrike
The only one that really comes to mind is X-wing.
Similar commercial successes in the area
X-wing is pretty popular valley-wide.