Temari
Kankuro
Zabuza
Asuma
^^^stops at gaara whether they're part 1 or 2 version. I still don't see any of their attacks cutting gaara's sand. Gaara's sand has never gone down to a slash attack. It even held up against 5 susano'o sword. The only one who has a chance to break gaara's sand is asuma, if he decides to toss his knives as piercing attacks. Other than that, their wind, water and fire attacks are all pretty useless against gaara's auto defence..
No sharingan Kakashi - He clears mid diff. Raikiri would put down gaara easily.
Kitsuchi - He can clear mid. He can block gaara's sand attacks with his own sand attacks or earth attacks. He can then crush him with his large scale attacks.
Darui - Clears mid/high. His raiton attacks will get him through this. Raiton attacks are good at piercing, which is what's needed to get through gaara's sand.
Sound 4 as a whole - These guys lose to gaara mid diff. The biggest threats are kidomaru and tayuya's ghosts. Even if tayuya binds gaara with genjutsu, his auto defence will still work. In any case, gaara assaults them with the large waves of sand and the sand attacks at their feet. In that wide open area, kkidomaru and tayuya have no where to hide. Once kidomaru goes V2 and gaara sees he's a threat, gaara will bury or crush him. Kidomaru's armor isn't as strong as kimimaru's to stop it, nor does he have healing.
Sakura
Tsunade
Neji
Chouji
Lee
Gai
Hidan
Mei
Konan
Yamato
^^ Clears mid/high diff. K11 one's lose if pt1 versions.
Sai - possibly loses to naruto.
Cee - possibly loses to naruto
Nice read although there were a few mistakes like using part two Gaara's feats and handing them over to part one Gaara. I'm unsure how Konan and Hidan have a better shot at breaking through Gaara's defences with their metallic weapons than the likes of Asuma and Temari. Fuuton>metal when it comes to breaching defences.
Only Tsunade, Sakura, Mei, Konan and Guy clears it.
If people could rest, how many people would be able to clear the gauntlet?
Temari: She should be able to beat KN0 Naruto with low difficulty considering the AoE of her fuuton and her ninjutsu execution speed. Lee would be a bit problematic and would push her to mid difficulty. Temari can visually keep up with Lee just fine considering her eyes kept up with the fight against 3rd Raikage and KCM Naruto. She can swing her fan fast enough and keep Lee at bay. Smoke clouds created by her wind can be used as cover allowing her to conceal herself and then oneshotting Lee with an unsuspecting KKM. Against Gaara, Temari would have to end things quickly considering she's lost quite a bit of chakra already and she'd likely not be able to dodge his sand attacks. If Temari can force Gaara on the defensive and prevent him from going on the offensive, she wins because his part one sand gourd isn't strong enough to tank a wind cast net or KKM from a part two Temari.
Kankuro Numbers could give Kankuro some trouble but he can spread poison gas in his blind spot and take out Naruto's clones by spamming. mechanically propelled projectiles. Kankuro should beat Naruto with mid difficulty. Lee was pretty wreckless back in part one and he is no doubt getting poisoned by Kankuro's various traps in his puppets. Kankuro should take this mid difficulty. He can't beat Gaara though unless he can somehow force Gaara to inhale poison. Gaara beats him mid difficulty.
Zabuza:Naruto can't see him so his clones are getting taken out fairly easily. He beats Naruto low difficulty. Zabuza can put Lee in water prison until he goes gates in which case, Zabuza can most likely outlast Lee via bunshin feints and look for an opening. Zabuza wins mid-high difficulty. At this point, Zabuza will be somewhat low on chakra and probably unable to use wide scale suiton which is still probably not good enough against SRA Gaara. Gaara takes him out with mid difficulty.
Asuma:Asuma should be able to steamroll Naruto much like Kimimaro. He takes this low-mid difficulty as his chakra knives have better range than Naruto's attacks and he is better at taijutsu as well as faster. He'll lose some chakra by the time he fights Lee and he may actually lose but I reckon Lee's at a disadvantage against chakra knives because if he tries to attack Asuma head on, Asuma can just adjust his wrist position to cut off Lee's arms. Asuma should win with mid-high difficulty. Gaara will beat him for sure since Lee will give him a run for his money and Asuma will likely be in no shape to dodge Gaara's sand and get close to him. Gaara wins mid difficulty.
No sharingan Kakashi Kakashi takes them all out pretty easily. He beats Gaara mid difficulty at most. He can probably blitz Gaara and his sand isn't touching him. Sharingan isn't needed since Gaara is a stationary fighter so landing raikiri is easy. He can also go underground if need be.
Kitsuchi: Kitsuchi should logically be able to make rock clones which counter Naruto's since his rock clones are more durable and he's a better taijutsu user than Naruto. His earth platforms allow him to entrap Naruto's clone army and then finish them off. He wins low-mid difficulty with the only threat of being blindsided from the back. Kitsuchi should beat Lee with mid difficulty considering how his ability to move platforms can destabilize Lee allowing him to use mountain sandwich to finish him off. Kitsuchi's large scale doton should be able to defend against Gaara's sand tsunamis if he doesn't end Gaara at the very beginning of the fight. All in all, he takes Gaara mid difficulty.
Darui: Darui should take Naruto out low difficulty with far superior speed, kenjutsu, range and AoE attacks. Lee will also falter to Darui's ability to surround himself with lightning, rendering Lee useless. Darui takes Lee out low-mid difficulty. Darui can probably blitz Gaara and cut him apart with his raiton sword but if he manages to surround himself with sand, Darui would lose. I'd give it to Darui mid-high difficulty.
Sound 4 as a whole: I think they can take Naruto and Lee pretty easily and then Tayuya's dokis can faze through Gaara's sand while Jiroubo's earth dome can trap him inside for a while and suck his chakra out. This strategy can work if the sound know what they are doing and if their two main players survive up to Gaara.
Sakura/Tsunade: Should clear for sure. The only thing that can put them down is sand coffin which only works if they get restrained. Tsunade is going to be hard to restrain whereas Sakura is featless when it comes to that type of strength but punching the sand away or summoning Katsuyu will work.
Neji: Kyuubi chakra has shown to be resistant to gentle fist so he won't stomp that easily but still wins low-mid difficulty. Lee isn't much of a problem either since he can't breach his defences nor can he outlast Neji while Neji can keep up with Lee so Neji wins low-mid difficulty. Gaara can keep his distance against Neji although Neji will be a formidable foe. Once sand tsunami comes out, Neji is done for. If Neji manages to blitz Gaara, he still has to take care of sand armour before he can hurt Gaara which allows Gaara to attack him with sand. Gaara wins mid-high difficulty.
Chouji: He can survive pretty much everything and even Gaara's sand coffins will be useless since he won't be able to surround Chouji with enough sand.
Lee: I think Lee can take this by blitzing the opposition and then pounding them with a large number of attacks in a small amount of time. He doesn't need to go all out against Naruto and Lee so he should have the stamina to face Gaara and win.
Gai: He destroys them all without any effort TBH.
Hidan: He wrecks Naruto and Lee but gets wrecked in turn by Gaara.
Mei: She stomps Naruto with almost no difficulty and beats Lee low-mid difficulty. She beats SRA Gaara mid difficulty.
Konan: Flight and logia hax renders Naruto and Lee useless but she can't breach Gaara's defence.
Yamato: He won't have enough chakra to deal with Gaara IMO or else he can beat Gaara high difficulty.
Sai: Flight renders Naruto and Lee useless but he can't breach Gaara's defence.
Cee: Genjutsu one shots Naruto and Lee but he gets destroyed low difficulty by Gaara.