We always have tons of fun at Raglan Road, so I'm glad to see so many people have been "cheerleading" for it already.
50's Prime Time is very hit-or-miss. My mom went there once and had the time of her life. When she took the whole family back to it, ...not so much. (The idea is that the servers are sitcom family members and they won't break character for anything. I'm not a huge fan of that kind of restaurant anyway [locally, there's the aptly named
Dick's Last Resort, where the servers purposefully act like, well, it is right in the name, just remove the apostrophe...] but our waitress wasn't acting at all.)
Rainforest Cafe always struck me as wikkid wikkid loud (especially after a long day in the parks) with mediocre food, and I can only imagine T. rex would be all that and worse. By the way, who says girls don't like dinosaurs? I'm a paleoartist myself, and isn't the iconic image of the Disney princesses singing with little winged maniraptors on their fingers? XD
Has anyone brought up the Biergarten? (No, I haven't read the whole thread, sorry.) Haven't been there myself but the idea is every day is Oktoberfest.
And one thing I'm sure you haven't considered: a character meal. Make an ADR for one (Akerhause and Garden Grille, both in EPCOT, may be the best) and don't tell anyone what's up. Hilarity, I assure you, will ensue.