Naruto Uzumaki is the protagonist of the Naruto series, and one of the main characters in the ongoing Boruto: Naruto Next Generations series. As the Seventh Hokage of Konohagakure, Naruto is the strongest ninja to have ever lived, his only equal being Sasuke Uchiha. This strength of his was achieved once Naruto fulfilled his potential with sheer hard work and unbending determination.
With the level he's achieved right now, few can even hope to get as strong as him, and even fewer can manage to surpass him. Here is a list of 5 characters who can potentially surpass Naruto, and 5 who can't.
10 Can: Boruto Uzumaki
Boruto Uzumaki is the son of Naruto, and the protagonist of Boruto: Naruto Next Generations. As a Genin, Boruto is described as a prodigy who has great talent. In terms of power, Boruto is already around the level of Chunin, or maybe even higher. He possesses the power of the Karma at his disposal, along with a mysterious dojutsu known as the Jougan.
Being the vessel of Momoshiki Otsutsuki, there's no doubt that Boruto Uzumaki will grow in terms of power and once he gains control over Momoshiki's powers, it goes without saying that he'll be around the level of Naruto Uzumaki, and maybe even stronger.
9 Can't: Iwabee Yuino
Iwabee Yuino is a Genin from Konohagakure who excels at Ninjutsu. When it comes to fighting, Iwabee is one of the best from his generation. At the Academy, Iwabee had managed to overpower Boruto Uzumaki, a prodigy, rather easily. Unfortunately, Iwabee hasn't been a focused on much in the series for a long time now, much like Rock Lee in Naruto Shippuden.
Consequently, he will not get chances to shine as much as the main cast of the series. Nevertheless, Iwabee will certainly become a great shinobi in the future, but his chances of surpassing Naruto Uzumaki are nigh zero.
8 Can: Sarada Uchiha
Sarada Uchiha is the daughter of Sasuke and one of the main characters in Boruto: Naruto Next Generations. As a kunoichi, Sarada has the abilities of both her father and her mother. Akin to Boruto, she has huge potential and, if fulfilled, can become a tremendous Kunoichi.
Wielding the Sharingan of the Uchiha clan, it's no surprise that she can get very powerful in the future. Furthermore, Sarada Uchiha aims to be the Hokage of the village of at one point, and if she's to succeed Naruto Uzumaki, she will have to get herself close to his level through sheer hard work.
7 Can't: Metal Lee
The son of Rock Lee, Metal Lee, is one of the strongest characters among the next generation of shinobi. Being a part of Team 5, Lee specializes in taijutsu, and shurikenjutsu along with it. Being Rock Lee's disciple, Metal can also make use of the Eight Inner Gates, although to what extent he's mastered this technique remains unknown.
Despite having tremendous power and great room to grow, Metal Lee can't possibly get to a level where Naruto Uzumaki is at right now. Even if he manages to surpass Rock Lee, Metal won't be anywhere close to Naruto, who possesses power equal to a God.
6 Can: Mitsuki
A synthetic being created by Orochimaru, Mitsuki is the third member of Team 7, the other two being Boruto Uzumaki and Sarada Uchiha. According to Orochimaru, Mitsuki is a perfect being who has the potential to reach the heights that he failed to reach. As much, Mitsuki has a lot of strength already and he is strong enough to outclass some of the strongest known Jonin that we've seen to date.
Furthermore, Mitsuki has incredible potential, and although him surpassing Naruto isn't set in stone, he certainly has enough skill to keep up with Boruto, who is more than likely going to surpass his father by the end of the series.
5 Can't: Shikadai Nara
Shikadai Nara is one of Konoha's brightest Genin, being the only one to be promoted to Chunin rank after the recent exams. Just like his father, Shikadai possesses a keen intellect which lets him deal with even the toughest of situations calmly.
Furthermore, he also has the ability to use powerful Wind Release Jutsu, learning the said skill from his mother. Shikadai is likely going to transcend his father as a shinobi, but surpassing Naruto is a completely different challenge altogether, and he isn't going to accomplish that anytime soon.
4 Can: Kawaki
One of the new characters introduced in Boruto, Kawaki was adopted by Jigen and trained to become the next vessel of Isshiki Otsutsuki. Thanks to Amado, Kawaki's body was enhanced with incredible scientific technology, making him a 'scientific marvel'.
When it comes to strength, Kawaki is levels above Boruto Uzumaki, and he can already match an average Jonin despite his young age. Being Isshiki's future vessel, Kawaki is likely going to be around the same level as Naruto Uzumaki by the time he reaches his prime. Potentially, he could even surpass the Seventh Hokage.
3 Can't: Himawari Uzumaki
Himawari Uzumaki is the daughter of Naruto and Hinata and the younger sister of Boruto Uzumaki. As of now, she doesn't seem to be in the Konoha Academy, so her ninja abilities remain largely unknown. Nonetheless, she does possess the Byakugan, which is further amped by her huge chakra pool gifted to her by the virtue of being an Uzumaki.
Himawari isn't in the picture in Boruto: Naruto Next Generations right now, and likely won't be focused on much anytime soon. Consequently, she won't be anywhere near Naruto's level by the time the series ends.
2 Can: Sasuke Uchiha
Sasuke Uchiha is a legendary shinobi from Konohagakure who was once a part of Team 7 in Naruto. As of now, Sasuke is the only person capable of matching Naruto Uzumaki in battle, essentially making him an equal to the Seventh Hokage. With Naruto having been sealed by Isshiki Otsutsuki, Sasuke would need to step up and get stronger if he wants to free him.
Realistically, the only way Sasuke can crush Isshiki Otsutsuki is by training further. Therefore, the story demands Sasuke to get stronger than he is currently, and in the process, surpass Naruto Uzumaki.
1 Can't: Sumire Kakei
Sumire is a kunoichi from Konohagakure who is a member of Hanabi Hyuga's Team 15. As a Genin, Sumire is one of the strongest from her generation, although not stronger than the likes of Team 7. Nonetheless, Sumire does possess a great deal of proficiency in Water Style ninjutsu, and her summoning, known as Nue, is very influential as well.
Despite that, Sumire is not going to get close to Naruto's level in the series since she isn't all that important, and therefore, is barely featured. Furthermore, Sumire has now decided to work with Katasuke in the science department, so her strength and progression will likely be affected by this.