I won't argue with you on Vertigo, that was a DC gem, Sandman, and early 90's were definitely peak Hellblazer.
As for the variety of titles....I think that was just a result of the Era back then. Post internet free streaming and bittorents, I imagine the industry had more financial capital back then to take lots of risks on obscure titles than they do today.
I miss the days when you had a lot of b and c lister heroes sitting on the shelves.