Small spoilers there and general opinion about the movie. (i wouldt even call spoilers but ok)
There are quite a few different "versions" of Joker in the DC comic universe. Movie Dark Knight portrayed the one you just described.
This one portrayed another version of Joker & did it really good. Mentally ill individual that suffers when he lets society have its way with him, and frees himself when he has his way with society.
What a wisdom from this guy, isnt it @grga_man ?
such beautiful explanation by fairy, im so proud also i agree totally.