I can think of a few concepts for some of them...I'm sure Gamefreak can think of some decent ones for each...
Normal/Poison-Shrew
Normal/Rock-Armadillo
Normal/Ghost-
Opossum
Normal/Steel-Porcupine/Evolved Armadillo
Normal/Ice-Wolf
Normal/Dragon-Dunsparce evolution/Mega
Normal/Dark-Wolf
Fighting/Ground-Protoceratops (paired with a Raptor fossil)
Fighting/Electric-Mega Electivire
Fighting/Ice-Mountain Goat viking thing
Fighting/Dragon-Kung Fu Dragon
Poison/Steel-Mega Nidoking/Legendary manifestation of Industrial Pollution created by humanity
Poison/Fire-Cane Toad/Snake Fire Starter
Ground/Fairy-Star-nosed Mole
Rock/Ghost-Another freaking Golem
Bug/Psychic-Moon Moth counterpart to Volcarona
Bug/Ice-Weta
Bug/Dragon-MEGA FLYGON GAMEFREAK PLZZZ!!!
Bug/Dark-Cockroach
Ghost/Fairy-Possessed Porcelain Doll
Steel/Ice-Sentient Air conditioner....I wouldn't put it past Game Freak...
Fire/Grass-Tiki
Fire/Ice-Legend that controls Temperature Fire and Ice represent the two extremes in temperature
Fire/Fairy-Pele inspired Volcano Fairy
Electric/Dark-Mega Luxray
Ice/Fairy-Snowflake Pixie...perhaps inspired by Jack Frost
Dark/Fairy-What Lunala could've been....or some evil pixie thing...
See Above for Poison/Steel concept for another possibility