Another place could be FanFiction.net. It has been around for a long time and has a decent amount of fanfiction related to different shows and characters. However, the quality may vary, so you might need to do some sifting through the stories to find the really good ones about Ragnar and Athelstan.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions from various fandoms, and you can easily search for Ragnar and Athelstan fanfiction there. Just type in their names in the search bar, and you'll get a list of relevant stories.
One interesting fanfiction could be about their first meeting from Athelstan's perspective. He's a monk in a new land filled with Vikings, and his encounter with Ragnar is both terrifying and fascinating. It could explore his inner turmoil as he tries to understand these new people while holding onto his faith.
One idea could be a story where Ragnar and Athelstan go on a journey together to a far - off land. They face various challenges like harsh weather and wild animals. Along the way, they have deep conversations about their different beliefs and cultures, which strengthen their bond.
Highlight their shared experiences. They've both been through a lot together, like raids and encounters with different cultures. Write about how these experiences have shaped their relationship. For instance, when they first met a new tribe, they both had to rely on each other's skills - Ragnar's fighting skills and Athelstan's diplomatic skills to get out of a tricky situation.
One great 'female Athelstan fanfiction' is 'The Athelstan's New Path' which explores a different side of Athelstan's character when he has interactions with a strong female character. It's available on some fanfiction websites.
Try using specific keywords related to Ragnar and 'How to Train Your Dragon' on search engines. Also, check out fan forums where people might recommend good fanfictions.
Social media platforms dedicated to specific fandoms often have recommendations for good fanfiction. Also, some authors have their own blogs or websites where they post their fanfics. Another option is to join fanfiction forums or groups where people share and discuss their favorite works.
One good place to find such fanfiction could be Archive of Our Own (AO3). There are often a variety of fanfictions with different themes and styles there.
Another option is to check out specific 'Harry Potter' fanfiction forums. These are places where fans gather to discuss and share their fan - made stories. Some of these forums might have their own curated collections of the best 'i potter fanfiction' based on the votes or reviews of the members.
You can start by looking on Archive of Our Own (AO3). It has a large collection of fanfiction from various fandoms, including Good Omens 2. The site has a good search function that allows you to filter by tags, such as character names, relationships, and specific plot elements.
Another place to look could be Tumblr. There are many fan communities on Tumblr that share and discuss 'The Good Fight' fanfiction. You can follow relevant tags or search for specific topics related to the show to discover some great fan - created stories.