What is the role of cosmic entities like Galactus in the Marvel Universe compared to DC?

Galactus, a cosmic being who consumes planets to sustain himself, is a recurring and immensely powerful threat in the Marvel Universe, representing a fundamental challenge to the survival of Earth and its heroes. While DC has cosmic entities like Darkseid, Galactus's role as a constant, existential threat is arguably more prominent and consistently utilized in Marvel's broader narrative.