Chemosh

The first Ancient on record and the one most documented. Early recording estimate Chemoshes destructive capabilities to be on par with a strong titan which lead to many scholars hypothesizing that Ancients are just powerful Titans.
A common refrain from earth was "Wherever Chemosh wanders night follows". All video records show him as an amorphous black mass and his mere presence seemed to darken the environment. Combat logs show him having extreme gravitational powers.
During his battle against the mars fleet he caused a dozen capital ships to be pulled into a meteor as if it had the mass of Saturn. He caused the rest to collapsed under their own weight in 0-G.