Johan had a name, 2 actually... well if we count his alias then the list of names grows.
He has a lack of morality? maybe not really, remember that when Johan kills the ones that wronged the doctor, he does this out of gratitude to him for saving his life, his actions don't follow our morals, nor our current mind set of what is ethical and right, however his actions do follow a "twisted" form morality an ideal or way of thinking that was implanted on him as a child.
His loneliness by the point he became an adult is not relevant enough to fuel his actions, and vengeance doesn't really correlates with what he does on his present, at best he seems to follows shattered parts of what they inculcated on him as a child, well and this can be debated because dem nazis are fucked up, so he very well may be just a perfect example of the thing going well.
But Johan, the Monster is a case too particular for him to become a metaphor of the human condition, thus i can't agree with you, however in the grand scale of things Johan was not the only monster, and he was even part of an organisation, not only that but we get various smaller monster in the whole series, and they all have something in common, they all are human... if you tell me that humans can't live along with monsters, i will have to answer that humans are monsters themselves, and thus what you say is that we can live with ourselves XD.
BTW all those that i mentioned in my 1st message are mangas, with 20th Century Boys having a live action adaptation, that is actually good, but that leaves a lot, and i mean a lot (almost in excess) out of the movie, so i recommend watching it, only after finishing the manga.
Recommendations:
Master Keaton, this one is excellent and it works in arcs, each one with something to make you think, is from the same author of Monster, i don't know why i forgot to mention it 1st since this one is so damn good, also watch the OVAs and read the manga.
Texhnolyze this one is one of my favs.
Now and Then, Here and There, is my all time favorite, and is quite straightforward.
Paranoia Agent, this one is also great, and of course this demands watching "Serial Experiment Lain", which is actually good but also overrated XD. These 2 can be a little bit troublesome to understand at first.
Speed Grapher, while this one is more action oriented it also has it deepness.
Doomroar
Did you really want me to explain it? because i can, but it will be long and it may include links to the pages of the manga.
The story is great, so i do recommend reading the manga they are always better than their adaptations, and while you are at it, give 20th century boys a look, and the sequel too, and Pluto, and Billy Bat, and pretty much everything by the author.
Oh-Sama (Updated )
I was thinking after posting on this blog: the monster had no name in the first place so I guess his identity shouldn't matter. Whether it's hate or lack of morality, vengeance, racism, loneliness or whatever is it, it's always a monster. Humans can't live along with monsters...
Do you agree?!!
Also, any recommendations for "Monster" like animes?
I have watched "Death Note", though I guess "Monster" has a better story line.
I was looking for Naoki Urasawa' works and some people have recommended "20th Century Boys"
Sure thing I'll watch that :)