Captain Falcon. 1.0.8 onward.
Clean hit; 11% hitbox, 70°, 10 base, 100 growth
185 KB: 159%; 205 KB: 180%.
10% hitbox, 70°, 10 base, 100 growth
185 KB: 174%; 205 KB: 197%.
Late hit; 10% hitbox, 30°, 8 base, 80 growth:
185 KB: 228%; 205 KB 257%.
9% hitbox, 30°, 8 base, 80 growth
185 KB: 250%; 205 KB: 282%.
Remember, Captain Falcon's Uair used to do 13%, 12% clean and 12%, 10% late... Yeah... Would check on it more, but I'm feeling lazy. Apparently there were knockback changes too...
Hmm, let's see what Fox's is like.
11%, 85°, 30 base, 100 growth
185 KB: 137%; 205 KB: 159%.
Booyah, I love this move. Remember, on the ground. Damn thing would KO at like 100% in the air. Which... it does.
The one weird thing is that since Falco's Uair was and still is Fox's -- Brawl made it an arcing hit that uses the same front flip animation --, but with much lower knockback and some other stuff like different angles and the stupid sour-spot, it technically KO'd at the same frame and same percent; second hit of Fox's Uair is frame 9 while Falco's startup was frame 10. Fox's will do a lot more damage and will KO much earlier, but there's a point, between around 160%, that they're pretty much the same moves. Kind of neat.
Meanwhile, Ness...
13%, 85°, 13 base, 109 growth
185 KB: 118%; 205 KB: 135%.
And I just realized that I used 185 KB because I kept checking BJN39's post and... Well, whatever.
Rosalina...
Frame 8-10 clean hit; 10%, 88°, 40 base, 98 growth
185 KB: 142%; 205 KB: 166%.
Frame 11-21 hit; 5%, 88°, 40 base, 98 growth
185 KB: 256%; 205 KB: 296%.
Frame 22-29 late hit; 2%, 88°, 20 base, 30 growth
Theoretically, 185 KB: 1860%; 205 KB: 2094%.
... and Luma.
4%, 108° or 92°, 110 base, 60 growth
185 KB: 246%; 205 KB: 324%.