You would have to specify which neji and Lee you are talking about. If it's the Shippuden version then Neji and Lee would win, but if it's the Lee and Neji during the rescue Sasuke arc then Kimimaro would win.
It is not said that kimmis bones can block chakra.yes he does. he cant attack organs if they are protected by bone armour.
This about sums it upMy guess would be Neji & Lee actually I think I would be an easier fight for Neji facing Him than facing Kidomaru and easier for Gaara facing Kidomaru than KIMIMARU for a number of reasons
1. KIMIMARU despite has projectile ability is a taijutsu user more specialized in close range same goes for Neji
>> That means KIMIMARU would tend to close in to hit the target
>> That would save the trouble for Neji locating & catching him like what Neji did in Kidomaru
>> KIMIMARU does not posses an armor like Kidomaru that would protect him from Jyuuken
>> While KIMIMARU has good reflexes Neji has Baykugan that helps him accurately perceive movement
>> Neji seems to have faster arms compared to KIMIMARU so hiting him w/ Jyuuken wont seems to be a problem
>> & if KIMIMARU tries to use his bones if his hands are full Byakugan can see through it 7 neji would most likely avioded it
>> Also jyukeen is a one hit kill even for 2nd form - remeber Kidomaru only got hit in the last part of thier battle in his 2nd form & he still died
2. As for Gaara vs KIMIMARU though not being asked hear both he & Kidomaru have range attacks
>> Gaara can do offense & defense at the same time & Kidomaru's web wont likely stop Gaaras defense as it does not work like Nejis'
>> It does not seems Kidomaru's attacks can penetrate Gaara's sand defense
>> While Gaara's sand attacks would probabaly crushed him.
i could be wrong though
...yes he does. he cant attack organs if they are protected by bone armour.