Actually, Larvitar and Pupitar are Rock/Ground type, only Tyranitar is part Dark (it loses the Ground type in favour of Dark).
Alright, here goes with the list
Carvanha (Water/Dark)
Sharpedo (Water/Dark)
Crawdaunt (Water/Dark)
Houndour (Fire/Dark)
Houndoom (Fire/Dark)
Nuzleaf (Grass/Dark)
Shiftry (Grass/Dark)
Tyranitar (Rock/Dark)
Sableye (Ghost/Dark)
Did I miss any? *checks list* No, I don't think so :-)