I want to see a Havenworlder from a high grav planet. Dense and tough by necessity from the environment, but with absolutely nothing dangerous in to it in its home planet. No rough terrain to fall down, plentiful food without any toxins that effect it, gentle weather that never bothers it, etc. -- Anon Guest
Gravity is usually necessary for life to evolve. Most life comes to become on planets, with a rare few becoming in lower gravity environments that are also sealed against the greater vacuum of space. More often than not, life occurs on a planet of One Standard Gravity or thereabouts. There are many more worlds in the universe with higher than One Standard Gravity. Statistically speaking, some of those are Havenworlds.
Of the Heavyworld species, the most famous intelligent species is the Gaux. They are not Havenworlders. Their struggle to the stars included the Two Standard Gravity environment that was their homeworld. THey have been described as looking like "the unlikely progeny of a centaur and a rhinoceros." Humans sometimes refer to them as "the headless centaur ones". They are a species from the highest known gravity environment.
Heavyworlders are less likely to follow the anthropoid model. They are more likely to be quadrupedal. They are more likely to have robust frames. They are less likely to be Havenworlders. That said, there are statistical anomalies everywhere. Picture in your mind a more muscular variant of the hippo, roughly the size of a domestic pig. In the place of an animal's head, the stub of a torso rises up in something that was not quite a head, but served the purpose thereof.