Well, my daughter with autism also does not like to wait, nor does she like very loud noises. The crowds haven't seemed to bother her yet. The only restaurants we have done with her that you list above are Chef Mickeys and CP. Please note that both can be really loud (and so can Concourse as it is right next to Chef Mickeys). However, the noise level hasn't bothered her at either place, I think because she is so excited to see the characters.
We have found with her, it is easier to eat at a buffet because of her wait issues. The few times we have tried the sit-down places with her, we brought her portable DVD player and had her watch movies while we ate and begged her to eat. This would keep her occupied for almost enough time for us to have an appetizer and to wolf down most of our dinner. Most of the servers were kind enough to pack our desserts to go. Or maybe they were just desperate for us to go.
We found that she likes Sci-Fi because of the movie clips, but I noticed on your other thread that your son does not like the dark. That may not be a good choice for him because it is fairly dark in there.
Honestly, because we are on vacation and we have to eat, we do the best we can. We eat a lot of counter service because it is quick, but we try the table service with the knowledge that one of us may be walking around outside most of the time with her. As you well know, that's just how it goes sometimes. But really, it is Disney World and as I have said before, my child is usually not the only one having a melt down. Several of the "typical" children are crying from fatigue, over-stimulation, etc. Try not to worry about this too much.