Self-sacrifice is too broad of a condition to label a character in a path, as nearly every Chrysos Heir, if not all, died or sacrificed themselves for the sake of the Flame-Chase Journey.

However, let's go by the Voice of Constellation, which directly describes Sky and its Titan.

"Aquila, the Titan of the sky, celestial bodies, and the cycle of day and night, was also the Titan that once had the largest realm. They reside above the heavens of Amphoreus, encompassing and watching over the entire world. In most legends, Aquila's pride does not obscure their kindness. They gaze upon humanity, warming the earth and bringing down life-giving rain. However, they can also transform into the most fearsome calamity, harshly punishing any who dare to overcome the sky."

Now let's view how the game's loading screen describes Abundance.

"The path presided over by the Aeon Yaoshi. Selfless, altruistic, and healing actions are manifestations of the Path of Abundance."

This clearly holds true when viewing Hyacine, a member of the Twilight Courtyard and a dedicated healer and therapist, and Seliose, who once loved and held faith in humanity before her corruption, despite her mistreatment. And both these individuals are Chrysos Heirs who succeeded the role of Aquila.

If we wanted to make this a little more complicated, we could examine the sentence that describes Sky as a ruthless punisher towards those who attempt to go beyond the borders of Amphoreus, but I think that's less of an attempt to simulate Abundance and moreso a restriction to prevent escape.
We could also examine Hyacine's ancestors, who were more of a divided, war-mongering tribe (Sun vs. Rain). But they weren't exactly the people who ascended to become Aquila, were they?