Naruto: 3-Tail Cloak
Sasuke- CS2
Kakashi- MS
Yamato- Wood Release
vs.
7 Mist Swordsmen (original, meaning) excluding Kisame.
People are painfully underestimating the 7 Swordsman.
Keep in mind that when the 7 Swordsman were summoned to the battlefield, even Kakashi looked distraught to say the least:
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The 7 Swordsman of the Mist are/were known throughout the shinobi world for a reason. The name still carries some weight even for the young Chojuro
Kakashi had an even battle with Zabuza alone. Even with the MS it doesn't change this fact. The MS does not grant Kakashi any additional powers except for Kamui, which of course he wouldn't even use in the early stages of the fight anyways. Even putting into consideration his training since then it's not like he can taken down 3 or 4
at the same time in an all out fight.
Yamato is roughly near Kakashi's level if not slightly less. His Mokuton techniques could be handled with either Jinin's Kabutowari, Jinpachi's Shibuki, or Hiramekarei presumably being wielded by Mangetsu in this fight
Sasuke's Cursed Seal 2 does give him a boost in speed, strength, chakra and the ability to fly, but CS2 Sasuke is at MS Kakashi's level at best. Sasuke's specialized weapon is his lightning-chakra channeled sword, but Ameyuri could counter that with his Kiba.
Naruto's 3-Tail clock is absorbed by Fuguki's Samehada so that advantage is completely gone.
End result, with difficulty the 7 Swordsman would win. I don't understand how even Team 7, composed of Jounin-level shinobi, would be able to match up with the powers of the:
-Kubikiribochou
-Samehada
-Kiba
-Nuibari
-Shibuki
-Kabutowari
-Hiramekarei
in a fight where they're all being used
at the same time by powerful and capable shinobi
For the sake of argument, even if we assume the members of Team 7 are stronger individually against the 7 Swordsman, this is an all out brawl with fighters who are more or less similar in strength. The side with more members is going to win, even if the last person left alive is unconscious on the ground