Try checking out dedicated fantasy literature websites. Some well-known ones like Tor.com or Fantasy-Faction might have the story of Aegon the Conqueror. Also, local libraries sometimes have related books or digital access to them.
Some dedicated fantasy fanfiction forums also have great 'Aegon the Conqueror Fanfiction'. People there are really into this kind of stuff and often share their own works or recommend others.
You might find the story of Aegon the Conqueror in 'Fire & Blood'. It delves deep into the events and characters related to him.
One great 'Aegon the Conqueror Fanfiction' is 'Aegon's Ascent'. It delves deep into his early days and how he came to be the conqueror. The character development is really well - done.
You could make an OC who is a skilled warrior from a small, overlooked kingdom. This warrior OC initially sees Aegon as a threat but then comes to respect his leadership and power. The fanfiction could detail their encounters on the battlefield and how their relationship evolves over time. For example, the warrior OC might be captured by Aegon's forces and instead of being killed, is given a chance to join Aegon's cause.
Aegon's return in the fanfic could also bring about a clash of ideologies. The current rulers might have different ways of ruling compared to his more straightforward conquering style. It could explore how he deals with modern politics in Westeros, like the influence of the Faith or the power dynamics between the noble houses.
Developing relationships is key. If your OC is in the world of Aegon the Conqueror, they will interact with various characters. Show how they react to Aegon, his sisters, and the different lords and ladies. Are they in awe of Aegon? Do they despise him? These relationships will shape your OC. For instance, if your OC falls in love with one of Aegon's soldiers, it will add a whole new dimension to their character and the story.
A meeting between them in fanfiction could be shown as a diplomatic encounter. Maybe Jon is sent back in time for some reason, and he has to negotiate with Aegon. He would use his wits and charm to make Aegon understand the future implications of his conquests. Aegon, being a shrewd leader, would listen intently and might even change some of his plans based on Jon's insights.
Economically, Aegon's return could be a game - changer. If he starts another conquest, there would be destruction of property and disruption of trade routes. On the other hand, if he manages to bring stability, it could lead to new economic opportunities. He could also introduce new forms of governance that might have an impact on how resources are distributed and economies are managed in the different kingdoms of Westeros.
You could start by looking on popular fanfic websites like Archive of Our Own (AO3), FanFiction.net. These platforms have a large collection of fan - created works and there's a good chance you might find the 'aegon seventh oc fanfic' there if it has been published on these platforms.
Another option is to check out some dedicated Westeros - themed fan communities on Reddit. Sometimes, fans share their own fanfics or recommend great ones there. You can post a request specifically asking for 'oc Aegon Targaryen fanfic' and see what the community comes up with.