AKA the Zoolander thread? Guess it would need a "really" or two before the ridiculous part.
Ok. Extra thin silicone adhesive, apply to non DWR treated (or washed out) fabrics (with sufficient porosity) for a truly durable water repellency.
Light/UL windjacket of sufficient HH + Cioch Nikwax Analogy Pump liner fleece hoody (or similar equivalent) = relatively light weight, adaptable cooler to cold weather rain gear.
Take cheapish Poncho, cut out large rectangle on front and sew some WPB or highly WR fabric there instead = more comfortable Poncho/rain gear for warmer weather (Ponchos can easily be modified to handle wind better). Especially so if combined with wide brimmed, eVent type hat (allows you to open up the Poncho neck area more).
Buy cheap, Ebay "sexy" nylon fishnet shirts for men for nice and interesting warm when wet baselayer that provides good warmth when combined with a midlayer of sorts and windjacket or rain gear outer.
Thrift store wool-poly or poly-wool blend dress pants make decent cooler and cold weather pants.
Linen-synthetic blends are great clothing for hot, humid weather.
That's all i got.
I have other ideas for sure, but these are the ones i have experience with. My other ideas require exotic fabrics that either don't exist or are hard to find without industry connections. (for example, tightly woven, non ripstop microfiber polypropylene fabrics have a lot of potential in the rain gear area as to not requiring a DWR to work well, would be very light, etc).