I'll have to take a look around, but I have unfinished walkthroughs for Anearth Fantasy Stories, Ys IV, Neutopia, Dragon's Curse, Lunar SSS, TM/FEOEIV, plus newer versions of my GameFAQs walkthroughs I've been too lazy to post.
You could put the PCE ones I listed as being planned, since I do plan on finishing them. I have many more planned, but won't bother mentioning them until they get started.
How strict are you being with the whole RPG definition? Since there aren't enough PCE walkthroughs in english in general, I think it's a good idea to include walkthroughs for any kind f questy game where a walkthrough may actually be required, like Night Creatures, Ys III, etc.
And just because a game has an english version, that doesn't always make it much easier for some people or mean that some people won't try playing the PCE version first... so I think that it'd also be a good idea toiclude Turbo walkthroughs. Again, its not like there's a ton of them out there.