Nope, the Sound four as a team would destroy Kakashi. Sure one on one Kakashi pawns them low-mid difficulty at best but together, it is a rape fest. Our man Kakashi did not have the stamina nor the expertise to fight multiple ninjas. He ran low on stamina after using four jutsus in his fight with Zabuza. That won't be enough to take down the Sound Four who were pretty elite chunins.
No need for Kimimaro or Sasuke because Sound Four themselves were beat by six genins (Neji, Kiba, Choji, Temari, Kankuro and Shikamaru). Ask yourself this, can Kakashi beat those six people I just listed from the SRA. Temari alone can take down an entire forest. Kiba alone can destroy a large segment of an area. Shikamaru's intelligence may be on par or even better than Kakashi. Neji and his ultimate defence would prove to be formidable against Kakashi as well. All six of them were stronger than most chunin level ninjas so don't say they were just genins so they lose no difficulty.
May I remind you that early part 1 Sasuke managed to put up a good fight against Kakashi and early part 1 Sasuke was absolute crap compared to SRA Temari, SRA Neji, SRA Kankuro and even the three others.
I don't understand why this site is so biased for Kakashi and yet Kabuto, who was on par with Kakashi back than gets hated on. For example, people thought that Kabuto would get owned by Shino, Hinata and Kiba in a VS thread even though he is on par with Kakashi. Now we have a thread in which people are saying that Kakashi would destroy sound four with relative ease despite the fact some of those same people would have said stuff like Shino solos part 1 Kabuto. If that VS thread had part 1 Kakashi and this one had part 1 Kabuto, people would immediately say that Kabuto gets fodderized and Kakashi takes the cake with no difficulty.
I actually like Kakashi much better than Kabuto yet when the manga made it clear those two are equals, some people say that part 1 Kakashi craps on part 1 Kabuto. Sorry for the rant but there is sheer hypocrisy on this forum.
I'll change my opinion when someone explains to me how Kakashi, without using any chakra, can win against sound genjutsu, powerful arrows, earth dome that swallows your chakra and a guy who can heal and protect himself from attacks at the exact same time.