The selection I propose is there : http://www.alt-codes.net/
I turned it into an anki file : https://ankiweb.net/shared/info/4250717112
http://www.theworldofstuff.com/characters/ for a complete list.
Maybe it could have been wiser to extract relevant alt-codes from the complete list, because there is bunch of useless codes in the 255 first codes.
alt-codely yours ,