Everyone’s drawn to different art and symbolism, so here are some other decks that might work for you both.
I agree about Deviant Moon, the surreal artwork really brings out the shadow side of each card. Some people do find it creepy, and I won’t use it with younger querants; however, I really enjoy the deck for its quirkiness too. So I don’t really struggle with it at all.
If you like contemporary stuff with traditional structure, check out the Modern Witch Tarot.
The Wild Unknown has these stark animal illustrations that a lot of people find intuitive. For something more nature-based, that could be a good fit.
If you want historical depth, Marseille decks have that classic feel. Just know they’re pip-based instead of fully illustrated. The Mystic Mondays has a modern look with geometric patterns and bold colors.
For anyone into Wicca or goddess energy, Dreams of Gaia incorporates those themes while still being accessible for general readings. What kind of artwork do you usually like? That might help narrow things down.