I, too, am a big fan of Brown Derby Lounge. All the seating is outdoors, so that could become a factor. And while it may have changed, last I was there they were very strict on serving the lounge menu only - i.e. don’t expect to be able to get something off the full menu. I also liked Baseline Tap house - although the menu is more limited.
For MK, if feasible. I’d agree with the previous poster who recommends hitting an MK resort. I’d hop the boat over to Wilderness Lodge and grab a table at Geyser Point - fantastic setting, again somewhat weather dependent. Tambu also a good choice. Not sure what time the lounge opens, but even the Wave proper in the Contemporary might be an option - walking distance, pretty varied menu, rarely crowded. If staying in park is better logistically, Skipper’s Canteen seems to have a good menu, gets positive reviews (I haven’t tried it yet) and walk-ups/day-of ADRs don’t seem to be too much of an issue.
Have fun!