This so silly let me tell you that the people itachi win's to and loses to and ones that are debatable
Here are the people itachi loses to
Kaguya
Madara
Current Sasuke
Current naruto
Hashirama
Here are the people he beats
Ay mid diff
Kisame mid diff
Diedara low diff
Kakuzu low diff
Kakashi 1 MS gets curbstopmed
Kabuto high diff
Orachimaru mid diff
Jiraiya high diff
Gaara low diff
Mei low diff
Oonaki mid diff
Muu mid diff
3rd raikage mid diff
4 Kazekage low diff
Killer bee mid diff
Sasori low diff
Hiruzen high diff
Here's the list that are debatele
Minato
Tobirama
Obito
Nagato
Soo itachi is in the top 10 he loses to 5 beats the rest and the other 4 are debatele
Ei - Itachi has a low chance of beating Ei . Ei is shown to clearly be fast enough to counter anything Itachi throws at him, and is capable of avoiding eye contact. He fought 26 Madaras for a long period of time and only eventually got caught off-guard while helping Tsunade, with only one Itachi and no liabilities, Ei shouldn't fall victim to genjutsu. He'll have a challenge getting through Susanoo, but Itachi's only real option will be to turtle inside of it until he runs out of chakra, and Ei can last all day.
Kisame - Itachi has a 50/50 chance of winning. Kisame can absorb jutsus, even if fire is spicy, and can at least use the partner method of dealing with genjutsu with Samehada if he's caught. Any contact with Itachi will dramatically drain what marginal chakra he has. Itachi can't survive Shark Dance.
Deidara - If Deidara can stay out of Itachi's range then Deidara has a chance of winning. The mines can attack Itachi from Susanoo's weakspot and the nano bombs will likely bypass Susanoo since it obviously lets air in, Deidara specifically created Garuda to deal with Itachi. Genjutsu has a low chance of working since Deidara trained his defenses since his last encounter with Itachi. Unfortunately too, Itachi does not possess Raiton.
Kakuzu - If Itachi wins, it won't be easy at all. Kakuzu has a natural defense to genjutsu since he lacks what Itachi needs to use genjutsu on him, Earth Spear also eliminates any threat from Susanoo. This leaves Amaterasu as Itachi's only real chance of victory, but Kakuzu is by no means slow, and is able to discard body parts if needed, and Itachi only has a limited number of shots. Speaking of which, Kakuzu can have his 4 Masked Ghosts swarm Itachi and blast him from all directions, forcing Itachi to waste chakra dealing with them too.
Kakashi 1 MS - Kakashi has proven to be physically comparable to Itachi, and Kakashi can Kamui snipe. I can't believe you'd actually say Kakashi would get curbstomped.
Kabuto - Kabuto stomps. Edo Itachi, whom is far more powerful than living Itachi (WITH help from EMS Sasuke) got dominated. You can use whatever excuses you want, that Itachi wasn't trying to kill, but Sasuke was trying to hurt Kabuto and he couldn't. Kabuto has every counter to Itachi's primary abilities. Kabuto was held back as well, aside from it being 2 against 1.
Orochimaru - Orochimaru with Edo Tensei stomps, it's not even funny. If Orochimaru doesn't have Edo Tensei, then Itachi could win with high difficulty. However, this is based off of Armless Orochimaru, we have no idea what Orochimaru can do now that he has all of his jutsus back. And considering that Kabuto suggested that Muki Tensei and White Rage was taken from Orochimaru's research, anything is possible. Let's also not forget that he has a Zetsu body now too, which should let him use Sage Mode.
Jiraiya - This is a 50/50 battle. Base Jiraiya has the capability to win, Sage Mode will almost ensure victory, the problem will be getting to Sage Mode.
Gaara - Itachi has a good chance of losing. Gaara's sand protects him from everything, he avoided eye contact with Madara, and he can see out of his Third Eye while turtling inside of his sand dome. His sand can also restrain Susanoo, as well as get inside Susanoo to grind Itachi to paste.
Mei - Mei would lose.
Onoki - Onoki has a decent chance of winning. Like Deidara, he can stay out of Itachi's range and he has shown to be able to avoid eye contact with a powerful Sharingan user. His Jinton is also instant death if it hits. The hard part will be getting around Yata, but he can do it. He can make clones to attack Itachi from all directions, and his Golem can be used to restrain Susanoo to give him a clear shot.
Muu - Muu may likely win. He's a stealth nuclear bomber, he can't be detected, he's very fast, and he can one-shot Itachi with Jinton if given a clear aim.
3rd Raikage - This is Ei on steroids, Itachi almost can't win.
4th Kazekage - He doesn't have an automatic defense, but he has the same options as Gaara.
Killer bee - Bee may win. He has the speed and skill, has V2, plus he can tag-team Itachi with Gyuuki by using a clone. If Itachi wins, it will be with high difficulty.
Sasori - Sasori has the same methods as Gaara and 4th Kazekage, plus an army of puppets, armor, body hopping, and tons of poison. Itachi's only chance of winning is hitting Sasori's heart cansister, which will be hard with the armor and body hopping, not to mention a moving target. Itachi will also have to survive the onslaught of poison, and turtle behind Susanoo for the iron sand and 100 puppets. Sasori could win just by forcing Itachi to exhaustion.
Hiruzen - Itachi wins against Old Hiruzen with high difficulty.
I'm also upset that 2nd Mizukage wasn't on the list, he'd definitely win.