White Dragon As Anti-Dragon

I have never been a fan of the chromatic and metallic dragons of Dungeons & Dragons, even when ignoring the Alignment aspect. Great variety but otherwise lacking both depth and need, in my opinion. Red dragons are the closest to traditional European mythology: flying fire breathers. That seems sufficient—with one exception.

Regarding Alignment, something recently reminded me that in Basic D&D, with its single Law-Neutral-Chaos axis, white dragons are Neutral. This makes them usable as mounts by non-evil people. A new idea then occurred to me: white dragons, being cold-based, would be the ideal counter to red dragons. Anti-dragons.

Perhaps not even true dragons, but a species created and/or bred by mortals or gods to protect against the true ones.