about the closest would have to be Darwin from X-Men, having immediate adaptability to almost any situation
but an ideal perfect organism would have a body similar or exactly like a primate in design for maneuverability and climbing, thick hides for dealing with the cold, eyes that can see in the dark or long distances, ears that can pick up faint sounds easily, an excellent sense of smell, coloration that can allow for blending, a light skeleton for movement or a thick one for carrying weight over long distances, a form of protection like claws (preferably retractable), webbed digits like frogs for swimming along with the ability to close off air passageways like alligators for underwater, and wings for flight.
Basically, a human with eagle/cat eyes, tough skin like an elephant, dog's ears and nose, fur like a snow hare, a bird-like skeleton and wings, (the I don't know what it's called organ that alligators have to allow them to stay underwater for hours) and webbed hands and feet, and claws like a lion - quite the chimera.
Or instead, a flying squirrel with amphibian lungs and claws