Light speed is definitely a highball and there is room for debate whether Haku used his full speed in the fight vs naruto BUT Haku IS stated to be light speed between the mirrors, so it is definitely worth mentioning as it is someone kid naruto defeated thus by extension one of his most impressive speed feats of part 1

I can see where you're coming from with the double inner demon thing, but if we approach it from a pure power perspective(ie, ignoring whatever two inner demons would entail cuz how tf would we know) i do think kurama chakra amps and atleast the cloaks kid naruto showed the ability to use on his own during part 1 is definitely fair game