You didn't answer my question, and instead you're making me ask more questions lol. How is the platforming in LBP average and how are other platformers better? Is it not the levels themselves that make a platformer a platformer? Also there are tons of great levels out there of all varietys, you just have to find them.
I apologize. Floaty is just not something you want in a platformer. You want quick and responsive with tight controls. Speed in platformers are important for challenges as well as the level designs. The level design in all the above series are top notch, quick responsive platforming, with great charm. That is in my opinion the 3 things you look for in a platformer.
A few other games as mentioned before fit these standards but they also arent as iconic either. I will say that Sacboy and LBP is iconic though.
Watch the level below and see why you need tight quick controls. Precision is key.
However, if the levels are built around this floatyness (which they are, as who builds a level without taking the player character into consideration lol) then it shouldn't be an issue. It seems to me like you're knocking LBP just because it plays differently. This is edvident by how you're posting a video of Rayman instead of an instance of LBP's floatyness being problematic. I don't think it's fair to say LBP isn't as good for not controlling the same as your prefered platformer. It'd be like me saying Sonic is better than Mario because it's more fast paced. That may be why I like Sonic better, but that doesn't make him better overall.