Galactus

Galactus, also known as The Devourer of Worlds and The Third Force of the Universe, was the only survivor of the end of a universe which existed before our universe. He became a cosmic entity while his universe died. But he only chance to survive was to eat whole planets. He had some servants who wanted to save their planets by helping Galactus. These servants for example were Silver Surfer, Terrax, Firelord, Air-Walker, Nova, Morg and Red Shift. When Galactus died, he became a star.