The answer is that they pretty much don't exist, unfortunately. There's a vast number for the SNES, of course, and many for the NES, but I'm sure you know that. If you're looking for SNES games, though, I know them all pretty well. Honestly, though, just go play Dragon Quest III-VI again. It's not going to get much better than that.

The series you'd like most are Dragon Quest (obviously), Final Fantasy pre-VII, Lufia, and Breath of Fire (except for possibly Dragon Quarter). I know this, because they are the series I like most (except for Xenosaga, which doesn't fit my normal taste).

You might want to try Etrian Odyssey for the DS, but I can't promise anything since I haven't played it yet.