I'll just give my favorite 1-credit dinner spots, then.
1. Sanaa - Really unique, signature-quality food with a good staff and fair ambiance. If your party is adventurous and you think you'd like the Indian and African flavors, I highly recommend it.
2. Kouzzina - Lively, celebratory atmosphere and great food that would satisfy a wide range of palates. There are some great dishes with Greek and Mediterranean influence, and others that are more like Southern comfort food with a twist.
3. Olivia's Café - Outstanding food for the meat-and-potatoes crowd. I don't care much for the dining room, but our experience has been that the staff are friendly and they love the menu they're serving. Trust their recommendations because they know what they're talking about.
4. Grand Floridian Café - We've actually never been there for dinner, but we like their lunch menu a lot, and it's pretty similar in the evening.
5. Boatwright's Dining Hall - This was a surprising hit for us in 2011 — so much so that we made it a point to return in 2012. The pork chop, prime rib, and French onion soup are all well-executed dishes. The butterscotch crème brûlée is a wonderful dessert.
6. Portobello - The only good Italian food on Disney property outside of Il Mulino, in my opinion. The only reason I wouldn't put it higher on the list is that the dining room is packed pretty tightly. It's a little better for tables of four than two, but I think that every table in the place is uncomfortably close to its neighbors.
There are others that I would recommend, too. Kona, if you weren't already doing 'Ohana. San Angel Inn if you didn't already have it listed. I used to love the Coral Reef, but it's been a few years since we've visited and I can't speak to its recent quality. Raglan Road, but that one is so popular that I'm sure you've already considered it.