well, word "hardest cary" must be defined.
hardest to farm, hardest to kill.... etc
duno rly. i guees that strongest hero in lategame is void, if he manage to take good farm and oponets to let him farm.
in those cases he will pwn them all easly couse they wont be good to counter him..
all depends vs what heroes he plays.
my fav cary is juggernaut,couse my 1st game in d1 was with him, and i rly like to play with him... I also like sf,morph etc... But my speciality are suports, and aoe heroes