I'm in if it's D&D, otherwise I either won't have the game or min/max is futile and/or subjective(monopoly, risk, uno etc...)
I submit basketweaving as evidence of untapped min/max potential, as I suspect that the preliminary borked findings there were accidental.
Psionic sandwich is another that was intended to be a terrible character; yet, variations are playable(IIRC, could be waaay of here).
How about bizzare stuff like, gestalt e6 character that makes the best use of the Dinosaur Wrangler feat. E8 character with the highest DC breath weapon(s), has to have 3 fighter levels.
Best ranged attack, monk2, X3 20 point buy no LA.