It’s an odd question I know, but I couldn’t shake it.
The Lyrebird is very interesting! What a talent.
You could say that otters & dolphins have time to play, but often poor humans have plenty of time to play. Also I think you could easily be ‘poor’ but have plenty of time for sexy fun time.
Corgis aren’t wild of course. I thought about including domestic but then Bubbles the chimp would probably win.
My initial answer was: a pig in shit
But maybe the richest animal would be one of those predators that turned up on an island with loads of dumb, friendly, juicy native animals that haven’t evolved to run away. Abundant food, very little effort needed = happy days