Old school, it’s Scooby for a “smart” (as in talking) animal, with Dino from the Flintstones being the “dumb” pick.

Modern, Lucas the spider wins hands (or legs) down, with King from Owl house a runner up for the talking animals. On the quiet side, I can’t really think of many, but the dinosaur from Primal (called fang, but afaicr doesn’t have a name in the show itself) has to be that winner of those I can think of.

When I was a kid, the answer would have been Tigger, with no alternate list at all