Is corax white any good for painting a full marine?

I started painting my crimson fist army recently and i wanted to include some other dorn successors like the excoriators who wear full white armor. I ve heard that citadel corax white isn t very good since it s quite chalky and i looked for some other options but the only one is pro acryl titanium white but it s equivalent to white scar and if use it won t be able to highlight my marine since it can t get any whiter than that unless i apply a wash (which i wont't). Are there any good equivalents for a paint like corax white?