Good VNs that are not eroge (many of which were mentioned earlier):
Higurashi no naku koro ni,
Umineko no naku koro ni,
Phoenix Wright series,
the list goes on...
And many eroges have gotten stripped of their H content to make them more appealing to a larger audience (ex. Cross Channel, Utawarerumono, Kanon, Phantom of Inferno English release).
And there are many eroges which have so tiny amount of H, that I wonder why they put it there in the first place f.ex. Sharin no Kuni, if doing Natsumi's path (or "harem" path, which is no harem at all); roughly 15min of sex in 20h game?!? There are many eroges that people play for story, even thou they have H content. If you fapped during Swan Song or Saya no Uta, something's wrong with your priorities... Mostly I just skip H-scenes altogether.
Then there's eroge-like eroges (romance, sex, drama) that are actually good. I liked Yume Miru Kusuri a lot, you will shit brix on Aeka's final rooftop scenario. And "nukige" sub-class, which is propably the most known type of VN (to the public), where sex is the point of the whole game and story is almost nonexistant (Minna de Nyan, Do You Like Horny Bunnies, Immoral Study).
So yeah, you can make a living of writing non-H VNs but as mentioned, it is a really niche audience. Almost none of my irl "otaku" friends know what I'm talking about when I mention VNs or they just assume that "VN = eroge".
edited 7th Nov '10 11:46:44 AM by darkmind35