I did think of Dragons, but unfortunately I could justify them for both Fort and Will (dragons aren't known for reflex saves). And sadly, air elementals don't really have a good sense of epicness or power, since they scale from mook to titan of their kind.
I've played around with Elder Brain's Will, which is what Will is currently named, but it still sounds clunky to me.
Reflex, Reflex... I got nothing. Surely there's a Dex heavy iconic monster in D&D I'm missing. Anyway, I appreciate the names, maybe it'll inspire something else.