He's a lord of Hogwarts, descendant of all the founders, an Animagus, a Metamorphmagus, James and Lily are alive, he has a twin, and Ron and Dumbledore are traitors.
Mostly matching is King of Magic by Radiant Arabian Knights.
Harry learns about his inheritance and becomes King of Magical Britain. He has abilities which have been blocked. He also finds how Manipulative Dumbledore and the Weasley's are. Between Molly and Ginny giving his love potions to Ron and Hermione being paid money from HIS vault. Multi-Wives, Multi-Titles. Strong ultra-powerful grey Harry: Crossover Avengers/Percy Jackson/Thor/Harry
"Well you have many titles Lord Potter. Here have a look", Ragnok says handing over the parchment
Lord of the Most Ancient and Royal House of Gryffindor (UK)
Lord of the Most Ancient and Royal House of Ravenclaw (UK)
Lord of the Most Ancient and Royal House of Hufflepuff (UK)
Lord of the Most Ancient and Royal House of Slytherin (UK)
Lord of Hogwarts
Metamorphmagus: 98% Blocked
"Yes they do. The Potter ring makes it so you will find your Animagus shape easier it also protects you from poisons and dangerous potions", Ragnok replies
It is indicated that Dumbledore is behind him being suppressed. However, James and Lily are stated to be dead (which is why he's being read their will) and every "twin" reference I've found is regarding his new wives (it's that sort of fanfic).