Betterman: Kankel is described as the final stage of evolution, so much so he has the nickname of "Best Man".His mindbogglingly stupid amounts of strength, endurance, agility, and his insensitivity to pain all seem to be genetic, and as a result his son Baki is the only man on Earth who stands a chance of ever defeating him. He's the World's Strongest Man with Charles Atlas Superpower powerful enough to cause earthquakes with a Ground Punch, and can learn any fighting style just from seeing it once. In contrast with the pseudo-realism the rest of the setting tries to have, he is such a superhuman fighter that every scene he's in flies straight into the immensely ridiculous. Invincible Villain Yujiro Hanma in Baki the Grappler is seen as this.
See also the Übermensch it's a matter of interpretation how closely these concepts overlap, but there are those who conflate the two. Someone with superpowers may hold this view of themselves see Super Supremacist. There have been Real Life claims that certain species or people do indeed fit the description, so adding examples to that section is perfectly fine. This doesn't stop Evilutionary Biologists from claiming this as the objective of their work while still claiming to be scientists.
(Unless it can shape/size shift, not really possible in real life.) Not to mention that multiple generations are required for the adaptation to complete via natural selection. There is no absolute direction towards "progress", or objective scale by which one can judge one particular species "more evolved" or "superior" to another, and no, there's not any way for a life form to be "perfectly adapted" for every possible niche, because this would require numerous contradictory traits. The idea of an Ultimate Life Form derives from a gross misunderstanding of the theory of evolution by natural selection - evolution promotes the survival of the entity best suited for its specific niche, and if that niche changes or disappears the species will have to change again or die out. Creatures of this type will tend less towards beautiful and graceful and more towards quickly reproducing, hard to eradicate, and dangerous to encounter. Works that attempt a more realistic approach may substitute individual ultimate powers for a more "ultimate species" approach hive aliens are often given this treatment, or have attaining this state through successive evolution as a goal. This is frequently lampshaded as well everyone imagines the Ultimate Lifeform to be infinitely beautiful and attractive, and while it may in fact be "perfect" it got that way from so many Power-Upgrading Deformations that it's become an Eldritch Abomination by dint of ugliness. There is an incredibly high chance that their appearance looks human(ish) sometimes the transformation to this ultimate form will make them look human even if they previously lost their humanity along the way or were never human to begin with. Just because someone believes himself or herself perfect doesn't mean they actually are. The concept is most often subverted by having the being turn out not to be really perfect or invincible, or turning against its creators (especially if it's a villain in the story).