I think maybe Srinivasa Ramanujan? Maybe not a full crackpot, but defo not worth spending time on because his work looked like Aliens came by and dropped a textbook.
I forget the quote, but one of the guys that recognized that he was worth looking into said something to the effect of "his work was too crazy for him to be crazy".
I forget the quote, but one of the guys that recognized that he was worth looking into said something to the effect of "his work was too crazy for him to be crazy".