He would most likely meet his father, Minato Namikaze, and his mother, Kushina Uzumaki. These are the two main family members he never really got to know growing up.
In this fanfiction, Naruto could also meet any siblings he might have had if things had been different. They could bond over their shared bloodline and have some fun adventures together, exploring their family's secrets and powers.
Besides his parents, Naruto might also meet his extended family. Maybe some distant relatives who were also ninjas and they could share stories about the family's ninja heritage. He could also meet his ancestors who had a great influence on the Uzumaki clan.
In this fanfiction, Naruto might finally have an emotional reunion with his parents. He could share all his adventures, growth, and the pain he endured. They would likely be proud of how he became a great ninja.
It could be Sakura. She has been Naruto's friend for a long time. She would be excited to see him return. They might share a heartfelt reunion, and Sakura could tell Naruto about the medical advancements in the realm while also asking about his adventures away.
There's a good chance he meets Kakashi first. Kakashi was his mentor and they have a strong bond. Kakashi might be out on a mission near the place where Naruto returns, or just be around the village doing his usual thing like reading his book at the training ground.
He would most likely meet his parents, Minato and Kushina.
Naruto might meet another lost ninja. This ninja could be from a destroyed village. They would understand each other's pain and loneliness. Together, they decide to start a family, building a new life far away from the memories of their past tragedies.
He might meet Iruka first. Iruka was always like a father figure to Naruto, and it would be a very heartwarming reunion. Iruka would probably be one of the first people to welcome Naruto back with open arms.
There could be a group of kids on the beach who are inspired by Naruto. They might approach him and ask for autographs or to show them some ninja moves. Naruto would be happy to oblige and in the process, he could discover a new talent among the kids that could be important for the future of the ninja world.
He could meet Hinata, and their relationship might develop further. Maybe she would be the first to greet him and express her admiration more openly.
In this fanfiction, Naruto's time travel to meet Minato could involve family secrets. Maybe there's a special family jutsu that only Minato was supposed to pass down but couldn't due to his early death. When Naruto arrives, Minato decides it's time to teach him this secret family technique. This could strengthen their family bond further and also give Naruto an edge in his future battles.
He might meet an old acquaintance who is also alone. They could share their stories and perhaps find some comfort in each other's company.