Yes, even Lovecraft's works contain a few SugarWiki/HeartwarmingMoments.

* In "The Shunned House," the protagonist and his uncle, Elihu Whipple, explore an abandoned house linked to a series of mysterious deaths over time. A yellow fungus transforms Whipple into a rotting monster which takes on, in rapid succession, the forms of all the house's former inhabitants. Just before it dissolves completely, however, the monster appears to struggle with itself and then assumes Whipple's kindly appearance one last time. "I like to think," says the protagonist, "that [[DyingAsYourself he existed at that moment]], and that he tried to bid me farewell."
* In ''Literature/AtTheMountainsOfMadness'', geologist Wayne Dyer, though initially spooked upon discovering the remnants of the extraterrestrial Old Ones' Antarctic civilization, concludes that--uniquely in a Lovecraft work--their alien nature did not mean they were evil [[note]]that designation belonging instead to their creations the shoggoths, which became corrupt and destroyed them[[/note]]:
--> After all, they were not evil things of their kind. They were the men of another age and another order of being [...] They had not been even savages--for what indeed had they done? [...] God, what intelligence and persistence! What a facing of the incredible, just as those carven kinsmen and forbears had faced things only a little less incredible! Radiates, vegetables, monstrosities, star spawn ó whatever they had been, [[NotSoDifferent they were men]]!
* Randolph Carter's interactions with the cats in ''Literature/TheDreamQuestOfUnknownKadath'' are filled with HPL's love and admiration for them.
** At the end, [[spoiler:''Nyarlathotep'' out of all people]] delivers one, telling Carter that [[spoiler: the beautiful city of his dreams that even the Gods of Kadath abandoned for was nothing more than his home city of Boston and his memories of New England]] in what may be one of the most beautiful passages in Lovecraft's works.
--> "[[spoiler:For know you, that your gold and marble city of wonder is only the sum of what you have seen and loved in youth.]] It is the glory of Bostonís hillside roofs and western windows aflame with sunset; of the flower-fragrant Common and the great dome on the hill and the tangle of gables and chimneys in the violet valley where the many-bridged Charles flows drowsily. These things you saw, Randolph Carter, when your nurse first wheeled you out in the springtime, and they will be the last things you will ever see with eyes of memory and of love."
* A couple in ''The Shadow out of Time''. Firstly, there's mention of the protagonist encountering the mind of a human in a Yith body who is from the 2500s, meaning that despite the CrapsackWorld Lovecraft built in his work, humanity survives, in some form, up to that time. Secondly, there's the fact that the Yithians are rather welcoming of those who they have stolen the bodies of. They're cared for until the five-year period ends, get to interact with others in the same situation, and over time, the protagonist comes to find the world he's been shunted into as not terrifying, but beautiful.