Sesame Street is great for exposure to a variety of types of people and some cultures. PBS in general is pretty good for that.
Bluey is fun for parents and kids, though it can give kids some high expectations from their parents.
Numberblocks is a good math concepts/counting show.
Storybots is a good learning about the world kind of show.
Paw Patrol has some life lesson kinds of things, but has more action/adventure stuff.