Oh wow! Thanks for sharing your knowledge! I think you hit them all except the new TSMM and Matterhorn FPs.
TSMM skips most of the queue. Usually when you merge there are only about 20 people ahead of you. Very worthwhile!
Matterhorn skips everything that isn't under cover, also very much worth it.
I have an alternate opinion about single rider and most can be worth it (as long as you time it right):
Screamin-if there are people past the exit platform (so along the wheelchair ramp), then I skip it. But if you can't see the line then it'll only be a 5-10 min wait til you are on the ride.
Goofy-single rider very worth it (the ride itself, questionable), but they sometimes stop SR if it backs up.
Grizzly rapids-definitely worth it because most don't realize it's there.
Racers-as long as you can't see the line, I'll typically go for it. But it's always shorter than standby and if you can't get FP, then go ahead and do SR to save time.
Splash-I will at least walk down to the exit area to see the line. If the line goes up and down stairs and over the bridge, then no. If line ends on bridge, maybe. If line ends on down stairs, then yes.
Indy-you can't tell ahead of time so it's a guess. I've had times where there's been 3 of us doing SR and that's it. I've also seen times when there are plenty of people lined up waiting to get in SR line. If you really want to gamble, walk all the way up to the later CM (in the room with the rope dangling down to the explorer under the floor), if there is no line to get into the queue, then go for it, otherwise turn back, but that wastes a lot of time.