I just purchased the Spider-Man noir and squirrel girl packs at Walgreens earlier tonight. I didn't even know they were released. It's such a relief not to have the stress of checking different stores every other day.
The more I think about it...
Johnny Quest, Scooby Doo, and most of the Hanna Barbera stuff could be cool minimates and good for vehicles too.
Sid and Marty Croft is another possibility.