Look ı now Minato is very popular, very beloved and very powerfull character. But he is also wasted in some other way. How ?
He is not completely wasted as Hiruzen and Orochimaru cuz Minato was the main setting of the manga's start. Plus he has so many connections with main character.
Father of Main Character
Master of The Main Char's Master (Kakashi)
Pupil of The Main Char's Mentor (Jiraiya)
The Sealer of The Demon Fox Who is livin in Main Character (Kurama)
So thats why Minato never wasted or bad treated as Hiruzen or Orochimaru.
But anyway, he also never reached to his potential. We never able to saw what Minato's reputation and portrayal at early times of the series offers to us.
He is also kinda trashed after retcon. Minato was kinda once in a century type prodigy who is even make strongest shinobi (the first god of shinobi) Hiruzen retired at who is still at 56-57 age.
He was that kinda man. Who is a sealing jutsu master, ninjutsu master, fastest ninja, teleporter, speedster, super brilliant, super intellect, Toad Artist (after Jiraiya) , Pupil of Jiraiya (who is the pupil of the 3rd Hokage) .
Minato offers many things wo single handidly sealed Kyuubi and defeat Madara (at least we tought it was Madara).
Then retcon happened and Uchiha is pushed to the center of the series and that brings Senju Vs Uchiha.
And thats why lazy Kishimoto didnt wanna create all new skillset and powerset for Tobirama intead of that he decide to gave all OP jutsus to Tobirama. He steal Edo Tensei from Orochimaru which was a nonsense, he steal hirashin from Minato.
And when 4th Great Ninja War happened. Kishimoto made Minato deliriously powerful and he also lately understand that Minato gonna steal show from Naruto, Sasuke, Tobirama, Obito, Madara if the things goes like this. And then he push to the asspull button. The same button used for Hashiran, Gokage and Hiruzen in the same time.
Sennin Mode + KCM2 Minato loses his arms one by one and didnt able to perform what his reputation and skillset offers.
He is still one of the best. Im not denying that but like ı said for Orochimaru, Minato builded up for more than that. We just able to see a glimpse from his brilliance.