I had a GSD with a floppy ear. I taped it, according to the accepted ways. The ear never stood up. The cartilage to hold it up just wasn't there in one ear. It was a wasted effort.
However, my dog was about 110 percent perfect in every other category, so who cares? Actually, it turned out to be something of a benefit because it really seemed to attract women who would comment on how it showed he had "personality."
I came to the conclusion that lots of women like slightly flawed dogs because of their experience with human males. They seem to find (some) flaws endearing.
If I have another dog with the problem, I doubt that I will care that much.