You mean Galactus. This is gonna get closed. But just before it does. Galactus kicks their asses into infinity.
Unless Ragnos and Sadow have been around since the beginning of the universe, eat planets for a profession, can manipulate matter very well, can teleport, through time, space and dimensions. Can boost their strength to incalculable levels, can boost their size to larger than planets, destroy entire galaxies when they get into fights, and have the power to destroy the universe 10x over again, than I wouldn't give them a chance against Galactus. Not even the Silver Surfer. Yeah the Silver Surfer would kick their asses too.